Showing posts with label simulated sweat imprint. Show all posts
Showing posts with label simulated sweat imprint. Show all posts

Tuesday, July 14, 2015

The Turin so-called Shroud: stunningly successful realization of a 14th century thought experiment?




Joseph of Arimathea's linen being used in 'stretcher mode' (NOT as a burial shroud). Might this kind of artistic imagery, fully in keeping with the biblical account, have been the inspiration for a 14th century THOUGHT EXPERIMENT, one that resulted in what today we call the Turin Shroud, erroneously so if taken to mean burial shroud, when in fact one's only entitled to call it a DOUBLY-IMPRINTED BODY ENVELOPE? Did the thought experiment assume or envisage imprinting as having  occurred en route from cross to rock tomb, NOT after the start of burial ritiuals with ointments, spices, winding strips etc and probable REPLACEMENT of Joseph of Arimathea's linen with that of Nicodemus's bandage-like winding strips?
(See my other site for more on the above painting and others of a similar genre that can be googled in image files as "deposition jesus from the cross", hoping the lower case does not give offence)

The further crystallization of ideas re the Turin so-called Shroud begain with this comment which I placed on a recent article by Kevin Kilbane in  Indiana's Fort-Wayne-based News-Sentinel: the article was ostensibly about Barrie M.Schwortz, documenting photographer for the Shroud of Turin Research Project (STURP).

ColinSB
July 11 2015 5:02 am
It's refreshing to see one of STURP's old hands, so to speak, still expressing a degree of caution re the authenticity of the Shroud. Yes, there is still much to be learned. STURP barely scratched the surface as to what the image is (sticky tape samples being the less damaging alternative to 'scratching' the surface!) as distinct from telling us what is not (definitely NOT a painting, despite attempts by some, notably historian Charles Freeman, to resurrect that notion with arguments that simply fail to address or do justice to decades of scientific investigation).

However, this Shroud researcher (3.5 years of testing different models) must take issue with a term employed here and pretty well every where else in the media, namely the description of the linen as a BURIAL shroud. I invite writer Kevin Kilbane and readers to go back to the Gospels and read what is said about Joseph of Arimathea and his arrival at the CROSS, not tomb, with fine linen. There is no indication that the linen was intended for use as a burial shroud (Nicodemus providing the wherewithal). It was merely for discreet and dignified transport from cross to nearby tomb. Once that is appreciated, then it greatly reduces the number of models that need to be tested, especially those that see the Shroud as having captured by some mysterious 'photographic' process the instant of Resurrection. Instead, one can view the image as a contact imprint, left in blood and PERSPIRATION. One then asks whether the Shroud bears a 2000 year old contact imprint, the body image being highly aged yellowed sweat, or a medieval attempt to reproduce what a then 1300 year old sweat imprint (plus blood) might have looked like.

My own preference is for the second of those. The current preferred model is one where a human volunteer is 'painted' from head to toe in a paste of flour and water and then overlaid with linen, gently pressed around contours, to leave a contact imprint. The imprint is then developed chemically, maybe with nitric acid to turn the imprint from white to yellow, or even by simple pressing with a hot iron!

Being an imprint explains the negative image, and even those 'mysterious' 3D properties revealed by modern computer software.


That was followed by this afterthought. Late edit: now highlighted in red, since it's suddenly disappeared from the Sentinel site (over-zealous moderation in response to outside pressure?)

ColinSB 
 July 12 2015 9:21 am
Oh, and one has to challenge the bit that reads: "...the cloth, which holds the faint image of a man who has been crucified." (my italics).

In point of fact, the "faint image" is simply that of an adult male, recumbent in his birthday suit. The sepia-coloured body image itself shows no evidence at all as to manner of death, even assumimg he was dead. The evidence for crucifixion, indeed of scourging, rests entirely on those bloodstains. Take away the bloodstains and it's, as I say, simply an otherwise unmarked male exhibiting extreme wardrobe malfunction.

Does it matter? Probably not if one tends towards believing the Shroud is authentic. But it does matter if one tends contrariwise towards the view that the Shroud is a product of medieval creativity and inventiveness. Why? Because it's a lot easier to fabricate, dare one say fake, a seemingly genuine Shroud if one can imprint the base image first off an unblemished body, and then - and only then - add bloodstains in all the correct biblical locations to suggest scourging and crucifixion. That's especially true in the proposed flour paste/hot iron model where one makes the flour imprint first from a healthy live undamaged volunteer, then adds imprinted blood (scourge marks) or trickles of blood (from otherwise invisible sites of blood hemorrhage - crown of thorns, nail and lance wounds etc). Sorry to be so pedantic - but the details matter hugely where that iconic - but maybe too-good-to-be-true body/blood image - is concerned.


Late addition: 16:15  the missing comments have now reappeared! I'll keep this red for a day or two, until absolutely sure that the comments are permanent.

That article and comments thread was then picked up by Dan Porter's shroudstory.com.

In the course of responding to it and comments there, I suddenly realized that the description of the linen in its glass case in Turin as a "shroud", especially as a "burial shroud" was not only an unwarranted assumption, at odds with the biblical account if one assumes (reasonably) that the linen in question is the actual fabric provided by Joseph of Arimathea (or more likely a 14th century proxy thereof, consistent with the radiocarbon dating), but was responsible for much unwarranted speculation re the mechanism by which the blood and body images were acquired.
 All the while, the cogs were turning in this blogger's mind as to what to call the Turin so-called Shroud if it wasn't a burial shroud, but the fabric as it might have looked if taken from the body on arrival at the tomb (to be replaced by Nicodemus's bandage-like winding strips, spices etc) and then "aged" naturally for 13 centuries or so.Thirteen centuries, note, not 20, since what one is doing is a thought experiment that started in a 14th century head: how might Joseph of Arimathea's linen have looked in 1350 if starting with then MODERN 14th century linen, and imprinting the body of a recently-crucified man in blood and sweat BEFORE it and its enveloping linen reached the tomb? Here's the comment with the first shot at new nomenclature right at the end (bolded hre, not the original comment)

 
Let’s avoid a lot of futile talking at cross purposes. I maintain that the Shroud is the realization of a thought experiment, carried out in the 14th century, freely admitting that requires mhaving to make some qualifying assumptions. That leaves you or anyone else free to question those qualifying assumptions if wishing to undermine and/or demolish my case. What you cannot do is come back with pro-authenticity thinking that makes its own qualifying assumptions and imagine they have any relevance to my medieval thought experiment scenario, with incomplete knowledge of actual historical events, and based instead on an imaginative reconstruction of those events, accurate or otherwise (probably the latter).

But there’s a further sting in the tail, as I have flagged up on the News Sentinel artticle. The description of the Shroud as a “burial” cloth goes beyond the biblical record. It is based on making a number of qualifying assumptions, all presupposing authenticity, and then uses that label “burial cloth” essentially to promote authenticity via the back door, so to speak. That back door is then left open so as to admit further fanciful speculation, requiring still more qualifying assumptions e.g. thatthat the superficial body image could only have been formed by miraculous flash of radiation at the instant of resurrection (overlooking to mention that the image thickness corresponds roughly with that of the primary cell wall of the flax bast fibre).

The desription of the TS as a “burial shroud” is an egregious example of “begging the question”. There is no greater academic sin one can commit, short of downright fraud, than to create and promote lines of argument that “beg the question”, ones that carelessly or shamelessly create a closed loop between preconceptions and conclusions.

I can see why sindonologists want the TS to be seen as a burial shroud, and do NOT want it to be seen as having any transport role from cross to tomb – that creating all kinds of problems re stereo-register or lack thereof between blood and body image. But I’m not buying into any of that. Solid scholarship never begs the question, and scrupulously avoids terminology that eseentially begs the question. There are no legitimate grounds – scientific, historical or biblical – for describing the TS as a “burial” shroud. In fact it’s best not described as a shroud at all. It’s the Lirey/Turin body-imprinted envelope.


Yup. The first thought was to call it the Lirey/Turin body-imprinted envelope (which wins no prizes for impact, far less for tripping easily off the tongue).


That comment became "promoted" as a new posting on Porter's site (in reality demoted if one reads his tetchy response).

However, the splendid  David Goulet (whose book I've always been meaning to read if I can lay my hands on it) put up this appreciative comment on Porter's site a few hours ago:
 
Colin isn’t saying the Shroud was the actual transport linen, he’s saying a medieval audience may have been convinced it was a transport linen. The medieval audience wouldn’t have known the Jewish burial customs. There is medieval art that shows a linen being used when Jesus is taken from the cross.

If the Shroud is authentic it is not likely a transport linen but a burial linen given the image characteristics. But Colin’s theory is premised on a medieval forgery.




 

In the course of responding to it, I was able to fine-tune slightly this blogger's preferred description for the TS as a "doubly-imprinted body envelope", which is DIBE when abbreviated as an acronym, just about tolerable I guess.

Here's the comment in question:

Thanks again David. Spot on as ever, which is impressive, given you are correcting the record on views that are not necessarily your own (though i suspect you are one of the few here to see some merit in them). Yes, this blogger sees the doubly-imprinted body envelope (what some choose to call the ‘shroud’ ;-) as having started in someone’s head as a thought experiment, one that was finally realized in an artisan’s workshop. (See a recent posting on this site as to how the body image could have been realized in practice).


 
Wife-assisted imaging of my crossed hands using simple flour paste/hot iron technology available in the 14th century, seen here prior to 650 years of ageing (the latter being needed for that authentic softer-focus, now-you-see-it-now-you-don't  Turin "Shroud" look).

 
 As you and I say, the recreated scenario did not have to pass the test of 21st century biblical scholarship. It had only to seem credible to 14th century pilgrims who were drawn to a must-see relic that claimed to be a bigger-and-better version of the Veil of Veronica, both having natural or semi-supernatural images captured as a result of brief contact between body and linen, the Veil’s en route to the cross, the ‘recently discovered’ rival en route from cross to tomb in J of A’s linen used in up-and-over mode, possibly but not necessarily as a makeshift stretcher.
That book of yours, David, re your childhood experiences in a family home that also served also as your father’s undertakers’ business: is it still available? I’d love to read it. You’re someone who clearly shares my love of words.

Those who frequent this investigative site know that each posting generally begins as a work-in-progress, this one being no exception. I'll stop here for now and hit the Publish button, but will probably be tacking some more on the end in a day or two. Expect to see an image from the Hungarian Pray codex (illustrated manuscript, dubiously invoked in support of Shroud 'authenticity' )showing both Joseph of Arimathea's linen and Nicodemus's winding strips in the same picture).

Update: Wed 08:16 London time:

Lo and behold, here it is.

 



Pray Codex: JA: Joseph of Arimathea's linen , as per Matthew, Mark and Luke, used to transport body from cross to rock tomb, with no suggestion in the biblical account that is was ever used or intended to be used as final burial shroud and N: Nicodemus's linen as winding strips for ritual burial according to Jewish custom, as described in book of John.

Further update: 08:41

This, from Charles Freeman, not this blogger's favourite historian (of the book-writing, not ivory-tower variety), on Dan Porter's site. He begins by quoting my words:


    "Thanks again David. Spot on as ever, which is impressive, given you are correcting the record on views that are not necessarily your own (though i suspect you are one of the few here to see some merit in them). Yes, this blogger sees the doubly-imprinted body envelope (what some choose to call the ‘shroud’ […]"
It had only to seem credible to 14th century pilgrims who were drawn to a must-see relic that claimed to be a bigger-and-better version of the Veil of Veronica’.

The Veil was an impression of the face of Christ when still alive. It was the top papal relic, the subject of enormous crowds when exhibited in St.Peter’s in 1350.

So how do you go bigger and better than that ? Clearly it was a PA disaster if only because no one at the time saw any resemblance to the image of a living Christ (cf. Image of Edessa), and the double image of a dead Christ.

The choice of venue was also a serious mistake- far too out of the way for a serious relic cult. Compare the Shroud of Cadouin which was on a major pilgrim route so you could hardly miss it!

It was also extremely easy to get it suppressed in c.1355. Altogether an enormous flop.
__________________________________________________

My response?  It can wait. I'm interested in seeing that of others first.

 

Notre Dame Cathedral Paris, built 1163-1345. That's just the inside. One wonders how the unsophisticated  medieval mind as portrayed by Charles Freeman, so easily confused we're told between one image and another,  pre- verus post-mortem, could have been capable of producing this


Update (10:10):here's the first response to Freeman on Porter's site from "Thomas"

"Well Lirey isn’t THAT far from Paris…and who knows, there could have been a certain ‘mystique’ in venturing into the wilderness to see a relic…I know I for one like exploring off beaten tracks.
Also to what extent did Paris temporarily depopulate in the wake of the Black Death??"



Update: 10:25  Briefly considered re-naming the Turin Shroud in a way that provides greater descriptive detail, i.e. as Doubly imprinted, attenuated, tone-reversed image, body envelope.

Then realised ;-) that some unkind soul would make a new acronym!

Update, 12:00: It didn't take long to find a history educator being highly circumspect about attempts to over-empathize with folk who lived in earlier societies entirely different from one's own (what I pejoratively call archaeo-psychology). Here's just one (my bolding)

"Bruce A. VanSledright (2001) locates historical empathy within the same critical tradition as Lévesque – Ashby and Lee (1987) reading Shemilt; Shemilt reading Collingwood – but is more pessimistic than him or his intellectual forbears about the possibility of empathising with those in the past. For VanSledright, the highest of Ashby and Lee’s five levels of historical empathy is virtually unattainable, and none of Shemilt’s fantasy archetypes are achievable, let alone desirable. The reason is an inescapable presentism: we simply “have no place to stand outside our present bearings from which we could make sense of the past” (p. 58). VanSledright is serious enough to trace this assertion to its logical conclusion – the impossibility of historical empathy."

Yes, best to stick to the facts, and not airily assume one knows better than non-historian layfolk as to what folk in the Middle Ages were really thinking.

Update: 13:15  this has just appeared from "Dcn Andy".


"Perhaps they weren’t ignorant idiots back then. That in no way means they completely understood everything. Architectural marvels in no way correlates to medical scientific understanding as we have it today."


The only kind of empathy one needs where then Turin DIBE is concerned is in asking what would be the first impression made on the viewer, seeing it with his or her own eyes, or hearing it decribed by someone else. Which features would make the greatest impacted. Let's imagine it's hanging verticsally, and one approaches from a distance. Here's my suggested list of key features:

1. It's a double-image of a naked man. The images are life-size. Why would they be life-size if it's just a painting? Maybe it's not a painting.

2. It's the same man, front and back,with a small separation at the head. He has a beard, moustache and longish hair.

3. The image is a fairly uniform yellow-brown, further evidence it's not an ordinary painting.

4. There's what look like bloodstains - a big one in the side and lots of others that are those expected from scourging and CRUCIFIXION. Ah ha.

5.The image is on linen, with an expensive-looking herringbone weave. Ah ha. The double image is because it was used "up-and-over" around the head, which suggests that the images are some kind of imprint left only by those parts of the body that made direct contact with linen.

6. There is indeed  something odd about the image. It has gaps here and there between raised parts of the body. No, it's not a painting. It's definitely an imprint.

7. It's as I thought. It's Jesus, the crucified Jesus. The big patch of blood is from the lance wound., ev So it's not the living Jesus. It is Jesus after he was taken down from the cross.
en though one cannot see the wound itself (why not?)

8. It must be the image left by Jesus on Joseph of Armiathea's linen.  Some of the image is blood, but there's that faint body image as well. Why?

9 .It must be a sweat imprint. It must be the same kind of imprinting process that resulted in the Veil of Veronica when cloth made contactt with just the face of Jesus. But that too was covered in sweat and blood, given he had a crown of thorns and was carrying a heavy cross.

10. It's a post-mortem imprint of Jesus, unlike the Veil of Veronica which was while he was still alive.

11.There is no loin cloth or crown of thorns. That's probably because they were removed before Jesus was placed in the linen.

12. Amazing. I could be looking at a whole body version of the Veil of Veronica, also imprinted in sweat and blood, but one of Jesus in death, after crucifixion, instead of life, when, according to legend,  he stopped next to Veronica on his way to the cross a day or two earlier.

13. This image is not legend. This image fits the biblical account of Joseph of Arimathea being allowed to remove the body from the cross, from which he placed it into fine, clean linen.

14. It may be his burial shroud. or there again, it may not, depending on whetherJesus was washed to remove blood.

15. There are no signs of myrhh, aloes, spices, ointments etc. So it may well be Jesus's imprint on Joseph's linen before being transferred to different linen clothes, supplied by Nicodemus.

16. Are the eyes open or closed? it's hard to tell, but then this is an imprint, not a painting. The eyes sit at the bottom of hollows, so eyes (or eye lids) would not imprint well, if at all.

17.While there's no crown of thorns, there's plenty of blood stains on the hair and forehead that are where thorns would have pierced the skin to cause heavy bleeding. It's not just any crucified man. It's the crucified jesus.

18. Those scourge marks, the lance wound, a nail wound in the palm (or could that be wrist?)  also make it a dead cert that it's Jesus.

19. This not an idealized,prettified image, such as an artist might paint. This is terribly, terribly realistic looking, what with the blood, the nudity, the scourge marks. This isn't a painting. It's the imprint left by the real crucified Jesus BEFORE he rose from the dead.

20. There are no wounds as such in the body image - only bloodstains to indicate the sites of wounds. Why is that?It's becasue the body image is a sweat imprint. Where there's a wound, there's blood but no sweat (or the sweat is masked). That explains the absence of wounds in the body image. It's impossible for the wound itself to be imaged on account of its blood.


Now let's try to reconstruct the thought processes of the entrepreneurial  and opportunist mind that conceived the Turin DIBE (reminder: Doubly Imprinted Body Envelope). The starting point will be the fabled Veil of Veronica.

Here are those "thoughts":

1. The legendary Veil of Veronica attracts thousands and thousands of pilgrims each year. It is the Church's most highly venerated icon. Where the Church goes, the Veronica accompanies it.

2. But the Veronica has no biblical authority whatsover. There is nothing in the Gospels about a woman wiping the brow of Jesus, bearing his cross on the way to Calvary, far less leaving his likeness on that cloth.

3. Why not create a new "relic" by supposing there had been another opportunity for Jesus to leave his image on cloth? Give the populace the thing it craves for- an image, preferably bigger and better, showing what Jesus really looked like.

4. There is an occasion when Jesus made contact with fabric other than his own clothes. In fact there are two, albeit post mortem. The first involves the linen with which Joseph of Arimathea received the body of Jesus from the cross. The second is the linen used by Nicodemus and Joseph at the nearby rock tomb to prepare the body for burial, described in the book of John as winding strips, used to incorporate sweet smelling myrrh, aloes etc etc.
Yes. more to come shortly.

5. Which of those two offers the better opportunity for displaying a captured image? No contest. It has to be Joseph's linen, which was clearly a single large sheet, not a long bandage-like strip for "winding".

6. How might an image of Jesus be captured onto linen, especially if the mechanism were the same or simialr to that which pilgrims take for granted where the Veronica is concerned? Answer: there's a brief contact between skin and linen. There's a faint imprint, in sweat, or blood, or both. Time does the rest to make that image darken and become more recognizable as that of Jesus. Being Jesus, part man, part God, one can invoke the supernatural if necessary if challenged by sceptics claiming the image is "too good to be true".

7.So one finds a way of imprinting the image of a man onto linen, such that it's instantly recognizable as the image that the crucified Jesus might have left on Jospeh of Arimathea's linen.  How does one ensure that it's not dismissed as the image of just anyone who had died and had been wrapped in cloth, even if they too had suffered death by crucifixion?

8. There is a way of signalling instantly to the viewer that a long sheet, representing J of A's linen, was used to receive a DEAD body. That is to show two images, head to head, one of the front of the body, one of the rear, with NONE OF THE SIDES (unlike a painting). In other words, the linen was used in up-and-over mode around the head so as to envelop the entire body. Some confusion with a simple bag-like burial shroud is inevitable,i.e. of the non-winding kind, but that is not without its advantages, even if at odds with the biblical account in the book of John. All that matters is that the image is immediately recognized as that of the crucified Christ.

 9. What if one encounters scepticism that an image of Jesus on Joseph's linen would be single - the rear side only if a body was laid on the sheet? No problem. As above, one says the linen was used in up-and-over mode so as to conceal the entire body from view. The linen would probably be strong enough to allow that up-and-over configuration to be used as a makeshift stretcher, with someone at the front, someone at the back, and maybe at the sides too.

10. Make sure the soles of the feet are well imaged on the dorsal side, but, in contrast,  the tops of the feet are poorly imaged on the frontal side. That helps make the case (if challenged) that the image is not on just any sheet of linen, but on Joseph of Arimathea's linen used in makeshift stretcher mode.

11. To make it clear that those two images are not painted onto the linen by an artist, but are IMPRINTS left on the linen by the highest relief of the body only, they must be created by actual imprinting from a real adult male, naked, smeared or covered with agents that simulate bodily sweat and blood.

12. The double body image must be subtle, not too intense,  as to look like paint or dye, not too faint as to be too indistinct. It has to look like ancient degraded yellowed sweat.

13.The blood is even more problematical. It needs to be red enough to be seen immediately as "blood", but not too red, given that blood goes brown with age.

14.Careful thought needs to be given to the order in which blood (or blood substitute) and "sweat" (or sweat substitute) are applied, either to the individual acting as template, or the imprint on linen. Much depends on the method used to produce the sweat imprint - a simple one step dye-imprinting OR a two stage process in which the body is first imprinted, and the colour then enhanced, e.g. with heat, chemicals or both. The method chosen for the latter must be one that does not destroy the blood imprint, or cause it to flake off.

15. How might whole body, double-imprinting be done in practice? Leaving aside for  a moment the crucial choice of imprinting medium, one might do it as follows.
Instruct the subject to lie on a floor face down. Brush one's imprinting medium thinly over the entire dorsal surface (NOT encroaching on the sides) Then add blood in all the biblically correct places. Then drape the lower half of the linen over the body, and pat the linen gently downwards onto the highest relief.  Then peel the linen away from the subject. One has one's dorsal imprint, with blood UNDER the body imprint.

16. Then  get the subject to lie on his back, with hands crossed over groin, and do the same for the frontal side, coating with imprinting medium, adding blood, draping over the linen, being careful to get the position correct re long axis and head-to-head distance, followed by peeling off as before. One now has one's complete primary blood/body double imprint. It can, if necessary, then be further "developed" at leisure to obtain a more prominent Stage 2 body image, hopefully without too much change to the blood (though a little darkening would not matter, and indeed might add realism).

17. Imprinting medium? Yellow paint? No, it looks like paint. Yellow dye? No, it will quickly soak through the pores of the linen, making a mess on the opposite side. One does not want that. Why not go for something that is finely particulate, that disperses well in water to make a thin paste, that leaves its solid on the side where placed when the water is removed by 'blotting paper' action? It doesn't have to be yellow or brown. It could be white, provided one has a means of making it turn yellow AFTER imprinting. Better still, find a white powder whose dispersion in water has adhesive properties, such that the linen sticks to the skin and body relief immediately when one is pressed against the other. Why not try ....  white flour? Now we're motoring. Correction, cantering.

18. Thinks. How might one get a flour imprint on linen to go yellow or brown, without affecting the linen (though a little darkening, as with that blood earlier, might not be a bad thing if it gave new linen an aged appearance)?  Heat maybe, like putting in an oven and watching closely, removing when one has the desired result? Or simply pressing the imprinted areas with a hot iron? Or maybe adding a chemical that makes flour turn yellow? An acid maybe, or an alkali? Nitric acid? Limewater?
 More to follow.


Update: 16 July

This posting is already too long of course, if seen as merely that - a blog posting. But it's not, of course. As I've said before, it's a old-fashioned millennial type blog, that term being a contraction of 'weblog'. In other words it is a diary, a running account, the only difference being that new additions are going onto the end, not the top (I tried the latter 'reverse chronology' model but it created too many problems re archiving).

I was briefly minded today to create a new posting, addressing some of the criticism voiced on that other site. The latter hoovers up all the new 'Shroud' content often within minutes of its appearance in the blogosphere, whose followers rarely bother to check with the originating site (as judged by my sitemeter) and who use that other site to post comments of variable qualit, never on the source site. They then presumably consider that the end of the matter, having expressed their invariably partisan views.

The question then is: do I need to spend time here (or there) responding to what really is bad netiquette in so many different ways? Reminder: we are not discussing any old Shroud issues. We are discussing new content - mine for example - that has required some thought and in many instances originality, that has also required a decision to 'publish and be damned'.

If there were a simple solution to this problem, dare one say abuse of internet, with a particular site effectively acting as black hole for new content, everything going in, nothing coming back out, then I would surely have discovered it by now. However, that will not stop me experimenting with new approaches, ones that show I'm watching what happens on that other site, am occasionally willing to respond, but not in the way that those folk over there would necessarily approve of.

Let's return to one of those comments, cut-and-pasted earlier, the one from Charles Freeman in response to my link between the 'Shroud' and the earlier Veil of Veronica. The only part I consider worth addressing is highlightied in red.

The Veil was an impression of the face of Christ when still alive. It was the top papal relic, the subject of enormous crowds when exhibited in St.Peter’s in 1350.

So how do you go bigger and better than that ? Clearly it was a PA disaster if only because no one at the time saw any resemblance to the image of a living Christ (cf. Image of Edessa), and the double image of a dead Christ.

The choice of venue was also a serious mistake- far too out of the way for a serious relic cult. Compare the Shroud of Cadouin which was on a major pilgrim route so you could hardly miss it!

It was also extremely easy to get it suppressed in c.1355. Altogether an enormous flop.



This blogger has written numerous postings on the link that WAS made right from the very first appearance of the 'Shroud' in the written historical record, starting in Lirey in approx 1355. They began with a close scrutiny of the Lirey Pilgrim badge, the latter receiving but a fleeting mention in Freeman's 'History Today' article, merely to acknowledge that the Man on the Shroud was entirely naked. But it was the discovery of the Machy mould for a second Lirey badge, assisted by Ian Wilson's invaluable research on its new and distinctive features, totally overlooked or ignored by Freeman, that finally led to this blogger abandoning his original 'scorch hypothesis' for an altogether different one that viewed the 'Shroud' as an attempt to simulate a SWEAT IMPRINT. Not for nothing did I call that a pardigm shift, knowing it would provoke derision, but I stand by that term. The sweat imprint hypothesis is and was a PARADIGM SHIFT. I do not intend to repeat my reasoning here. If folk like Charles Freeman cannot be bothered to read my postings, then so be it. But when they make assertions that show they have not bothered to acquaint themselves with an opponent's thinking, then I shall simply remind them where those thoughts can be found, and refuse to engage with them until they learn what I consider to be standard academic courtesy (which may or may not be on the radar screen of those who write books and magazine articles instead of academic papers or mere blog postings).

Here are screen shots of two consecutive postings in which, at the instant of paradigm shift, this blogger DID make that all important link between the 'Shroud' and the Veronica, asserting that the first known owners of the Lirey Shroud WERE ALSO KEEN TO MAKE THAT SAME ALL-IMPORTANT LINK, at least on the Mark?2 version of the Lirey Pilgrim's badge, arguably as a CRUCIAL AND DEFINING MARKETING PLOY.


 
From my specialist 'Shroud' site, Feb 15, 2014

followed by:



From the same specialist 'Shroud' site, two days later, Feb 17, 2014.
That's really all I have to say to Charles Freeman, except for this: some of us have spent the best part of 3-4 years, attempting to fit together the pieces of the 'Shroud' jigsaw puzzle - scientific, historical and biblical, to form a coherent and credible whole. Charles Freeman appears not to understand that there is a jigsaw puzzle, or if he does, has contemptuously kicked it aside in his oh-so-condescending magazine piece that tells the world it was 'just another painting' , which conveniently for him has somehow managed to lose ALL chemical traces of its pigment leaving us scientists dottily obsessed and spellbound by a mere 'shadow image' (undefined except, that is, for its curious and unique set of properties - negative but non-photographic image, 3D properties, ultra-superficial, easily detachable, half-tone character, diimide-bleachable, etc etc). Taking a celebrated line from "1066 And All That" I personally would rather be seen as "Right but Repulsive" than "Wrong but Romantic".

Update: I do not understand why Daniel Porter allows troll "anoxie" to use his site for her constant stream of ridicule and spite.

Here's what she posted yesterday, showing her now highly practiced modus opernadi of weaponising one's own words:

"AONU, you should know Colin is never wrong, usually he vanishes and comes back with a “paradigm shift”. 

Next time he’ll explain you why the shroud was not the actual transport linen according to his latest comments on his blog."

One hardly need say that science is not politics. Ideas are not political manifestos that have to be adhered to come hell or high water. Science works by proposing ideas, then testing them. If they fail the test then the idea is modified or abandoned. There is no shame in a scientist using the tried-and-test scientific model. Troll anoxie, who claims to be a chemist, should know that. But who is troll anoxie, hiding behind that pseudonym, leaving us ignorant of her claim to be a working scientist? I see little evidence of an enquiring mind.   Publications? Or is she merely following a superior's instructions?

As for the toxic comment re Joseph of Arimathea's linen, I have made it clear that I see its role in the mind of a medieval forger as allowing a discreet and dignified transport of body from cross to tomb. That is apparent from the three synoptic gospels: the linen was produced at the cross, not the tomb. Whether it was used as a makeshift stretcher, as suggested in so much medieval art, is of secondary concern. The key thing is that it was seen in a 'thought experiment' as a opportunity to envelop an unwashed body taken down from a cross. Why should I retreat from any of those suggestions that are an attempt to read the mind of a forger seeking a pretext from scripture to create a rival to the Veil of Veronica?

Yes, I abandoned the scorch hypothesis and proposed instead that the 'Shroud' body image was a simulated sweat imprint. I was so determined that folk should sit up and take notice that I called it a 'paradigm shift' That was the one and only occasion I used that expression. yet here we have troll anoxie suggesting I bandy it around, or that I am constantly changing my mind. I am not: ideas evolve certainly, but as I say, there has been only the one major switch from one model to another - scorch to sweat. Everything else has been about the details: paradoxically, the latter is by degrees becoming a scorch hypothesis too, albeit by proposed thermal or thermochemical effects on a flour-based imprint as distinct from linen fibres per se. As i say, ideas evolve in the light of new data: it's insulting to see it portrayed as a flighty changing of one's mind, and a demeaning of the scientific method.

Why should one have to waste time fending off what in reality are character attacks that masquerade as something else. Dan Porter should do the decent thing and eject troll anoxie from his site. One shouldn't have to ask. Site owners who rely on others to supply their content should not allow those others be made targets for people with 'issues' that have nothing to do with the advance of knowledge, whether in correct directions or otherwise. I repeat, Dan Porter. Kindly eject troll anoxie from your site.

Update: reminder re the Lirey Pilgrim badge (Cluny Museum):

 The man on the herringbone weave linen is bas relief, note (frontal side only shown here, but dorsal side is bas relief too needless to say).Think of the fiddly meticulous work that required on the part of the mould maker. His material was a softer variety of stone, assuming it was the same as the Machy mould for Lirey badge Mk2. He had to gouge out that stone and then buff the cavities and hollows to get smooth contours. Why would he go to all that trouble if the man on the 'Shroud' was just a 2D painting? Answer:because the message he needed to get across was that one should regard the image on the 'Shroud' as an IMPRINT from a real 3D man, not a mere sketch of painting, and that man was Jesus. If the image was just a painting he could simply have scored an outline on the stone.


Update: Friday 17 July, 2015:

See the new posting on my specialist "Shroud" site, posted this morning;.


https://shroudofturinwithoutallthehype.wordpress.com/2015/07/17/heres-an-updated-version-of-my-iconoplastic-modelling-of-that-turin-so-called-shroud-probably-a-misnomer/

Update: Friday 14 June, 2019 (yes, 2019, almost 4 years later!):

Here's a lightly-edited copy of a comment I posted yesterday to David Rolfe, Editor of the BSTS Newsletter:

Title:  Which came first: the Lirey Pilgrims' Badge or the Machy Mould version?

Have just been re-reading Ian Wilson's splendid article from 6 years ago (having deliberated myself for some 6 years on which came first - see title).

https://www.shroud.com/pdfs/n78part7.pdf

See also Dan Porter's report on that important posting:

https://shroudstory.com/2014/02/04/the-two-lirey-badges-unmistakable-differences/

Am now convinced, through joining up numerous dots, that the Machy Mould version came first, that it was displayed - whether in public or elsewhere - while Geoffroi de Charny was still alive, and that the  more polished version (Lirey Badge, Cluny Paris Museum) came later. What's more, I consider that it was the first of those that received enthusiastic approval from the local Bishop at Troyes, and the latter that shortly after, re-designed by de Charny's widow - Jeanne de Vergy - following her husband's death at the Battle of Poitiers in 1356 -  sent him into orbit.

Why? I'll explain if anyone's interested. Suffice it to say that it hinges on two entirely different perceived roles for the body image  on separate linens that we and our forefathers - going back 6 centuries - see on the Turin Linen:

1. A medieval reconstruction of the kind of faint, fuzzy negative age-yellowed image that might (theoretically/ideally) have been left on Joseph of Arimathea's linen, en route from cross to tomb, imprinted in body fluids - sweat and blood. In short - a whole body version of the (extra-biblical) face-only Veil of Veronica. (Earlier Machy mould)

2. A subsequent more problematical authentic 1st century image, one that might, with a stretch of the imagination, and little else besides, have been left on a final and formal burial shroud, totally separate from the preceding transport phase from cross to tomb. (Later Cluny Museum  Lirey Pilgrim's medallion)

I'd say more, but ... (final sentence withheld!)

Wednesday, May 6, 2015

The chemical principles behind the iconic Turin Shroud can now be explained. All that remains is to produce a look-alike copy.

Important update (13 May): for a 16 point summary of the new nitric acid model, see the new posting on my specialist Shroud site.
 
It's said that a picture is worth a thousand words. Here's a flour/egg yolk imprint done just two hours ago, photographed here after removal from the nitric acid bath, neutralized with bicarbonate, rinsed with water, shown here drying on the radiator, ready for processing in Image J (tone reversal as per Secondo Pia followed by 3D rendering).





Here's the above after further processing (click to enlarge).  Top left: the dried image after ironing flat. Bottom left: conversion to B/W, then a Secondo Pia style tone-reversal. Right: the secondary B/W image after 3D rendering (Image J).


It's taken over 3 years of almost non-stop experimentation, but this blogger/retired science bod is now able to explain how the faint negative image of the Turin Shroud was obtained (as a feat of medieval technology, aided by alchemists).

The task: produce a contact image that could be claimed to be that left by the crucified Jesus on Joseph of Arimathea's 'fine linen'.




It's incredibly simple in principle (why didn't I think of it sooner?):

1. Paint an adult human male (alive or dead) with an organic paste or slurry as imprinting medium (in other words, turn them into a giant rubber stamp). My preferred medium right now is a dispersion of white flour in cold water, but that could change).

2. Press linen against the subject (or subject against linen) to leave a moist imprint. Dry.

3. Develop the image chemically using a suitable reagent , one that converts the organic material to tan (yellow-brown) oxidation products (less probably Maillard reaction products).

My preferred reagent right now is nitric acid vapour, the means of production were known to medieval alchemists (notable "Pseudo-Geber" who may have been one and the same as an obscure Franciscan monk known as 'Paul of Taranto'

4. The yellow-brown aka sepia  imprint will be a 'negative' of the subject, inasmuch as the light/dark tones one sees in photograph are reversed. In other words, the highest relief  (nose, chin, forehead etc) will be dark, not light, and the lowest relief (eye hollows etc) will be light, not dark. They are light in a photograph as a result of reflecting most light. In an imprint, they are darkest through making best contact with a surface.

So I maintain that the plausible science is established - at least in principle-  so far as producing a negative  sepia 2D image from imprinting off a 3D subject is concerned.  Whether it matches all the additional or peculiar characteristics of the TS image (extreme superficiality, lack of reverse side image, lack of uv fluorescence, microscopic characteristics etc.) remains to be seen. However, let's insert a note of caution: not all those listed characteristics were necessarily there immediately after image formation, regardless of age - centuries or millennia. Some of those characteristics may be a result of ageing. At present it seems sensible to adopt a broad-brush approach, attempting to accommodate  only those 'headline' characteristics of the TS that have led to its being described as iconic or enigmatic. Where the latter are concerned, the prize for the most 'iconic' must surely go to the pioneering 1898 photography by Secondo Pia, which converted the Shroud negative back into a positive (by innocently treating the TS as a positive and convereting to a negative!).



It is the conversion one sees above that led to what must surely be the sound conclusion that that the TS negative image must be an imprint, probably a contact-imprint, one that on tone reversal allows one to see the 'real life' (or death!) appearance of the imprinted subject. It's for this reason alone that the dismissal by Charles Freeman of the TS as 'just another medieval painting' that has simply (and conveniently) lost its pigment over the centuries is so hopelessly blind to the implications of the negative image and Secondo Pia's spectacular discovery.

It's not sufficient, needless to say, to establish a scientific framework. There has to be a sizeable input of technology too. While history provided one or two pointers to the likely science (alchemy etc) there is no such  assistance where attempts are made to deduce the technology employed, i.e. applying the science in the manner that achieves the best end result. One does not even know for certain what the desired end-result was, or for what purpose, though I've believed it to be an attempt to simulate an ancient sweat imprint, ever since spotting that Veil of Veronica-like motif labelled SUAIRE on the Machy Mould for a Mark 2 (or Mark 1) Lirey Pilgrim's badge.  (It was that discovery more than anything that decided this researcher to abandon the idea that the TS was a thermal scorch, designed perhaps to symbolize the slow-roasting of the Templar leaders in 1314 for alleged heresy and other indiscretions. That seemed plausible given that one Geoffroi de Charney died alongside Jacques de Molay (Grand Master), de Charney being thought by genealogist Noel Currer-Briggs to have been uncle to his near-namesake, Geoffroi de Charny, Lord of Lirey, first recorded owner of the Shroud in western Europe).

So the working hypothesis IS that the TS is a simulated sweat imprint, that an imprinting procedure using an organic material was devised, probably with input from an alchemist, to develop the imprint chemically so as to produce a more intense, more easily visible yellow or yellow-brown colour. What we see now may of course be a pale shadow of the original, given centuries of fading, image fibre attrition etc.  But there's an upside to that: one does not need to be too concerned about one's pilot techniques producing images more prominent and/or well-defined than those on the Shroud.

After preliminary and somewhat unsatisfactory attempts to image from first  my hand (reasonable result) and then my own face (the less said the better - see preceding posting) I decided to use up-and-over imaging of the toes on one foot. The scale is handy for the size of my jars with the wide necks and ground-glass stoppers for nitric acid vapour. One can compare LUWU and LOTTO imprinting in the same experiment (which may or may not be relevant to the imprinting of the real Shroud). LUWU = Linen Underneath With Underlay; LOTTO = Linen On TOP, With Overlay).

I'll conclude this verbiage with photographs of results with this new tootsie test system as they come. Here's are some photographed just an hour or so ago. More will follow later. There are no plans to write any new postings until the current round of technology-testing is complete. Whole face imaging has been shelved for now. (Maybe Luigi Garlaschelli was right - a bas relief was needed for the face).

Imprint of toes onto linen (left) versus cotton (right). Imprinting medium: white flour/cold water only.



As above, after use of autocorrect in MS Office Picture Manager.

The lower half is a classical "footprint" obtained using LUWU configuration. The upper half is an imprint of the tops of toes obtained by turning the linen up and over, and gently pressing (LOTTO configuration).

More pictures to come (testing of egg tempera as imprinting medium etc).

Yes, egg tempera was the vehicle used as vehicle for paint pigments in medieval  times before the appearance of oil paint in the Renaissance. Despite being primarily egg yolk egg tempera not only attaches well to surfaces but is surprisingly durable. If searching blind for technology that might have been used to add flesh, so to speak, to the fundamental science, it would be unwise to ignore so common a commodity as tempera. In fact, there's one compelling reason for thinking why it may have been used, if only as part of a mix of ingredients: if the aim was to simulate a sweat imprint, it helps to have a visible yellow imprint before the chemical development (or indeed as a Mark 1 undeveloped imprint) given its yellow colour.

Here's the result of imprinting onto linen with a mix of flour, egg yolk and a little milk as extender.




...



Here's a comparison of three imprinting media:left- flour ; centre: egg yolk; right: flour + egg yolk. All had a little extra milk as extender (having been added to egg yolk to bump up the volume I decided the others should have it too).


Note the poor imprint on this occasion from flour "only". Well, as stated, is wasn't flour only. It was flour with a little milk. An immediate difference was noted compared with flour without milk - there was much less adhesion to the skin, much less force needed to pull the linen away from the skin.

The adhesion effect has been commented on earlier, with the observation that adhesion helps produce an instant high-fidelity imprint. That's due to the amazing ability of flour paste or slurry to stick onto so many different surfaces (this blogger has a photo album he made as a small child in which flour was used as an austerity-era paste - most  of the photos are still where they were stuck). A reasonable working hypothesis might be that milk has weakened the adhesive power of the flour. Good or bad thing? At first sight bad, because it means less flour attaches to the linen (probably) giving a weaker imprint. But might there be an upside? Possibly, as will be discussed shortly.

Yes, one encounters something quite unexpected when imprinting with flour paste. The linen quickly absorbs the liquid when pressed against the skin, such that the latter seems almost dry when the linen is peeled off. That makes for a good imprint, obviously, with so much flour transferred from skin to linen. But there's a possible downside. If transfer is complete, or nearly so at all contact sites, regardless of applied pressure, angle of contact etc, then how can the image be expected to show the 3D properties of the TS image. For 3D properties there needs to be some systematic factor at work such that variations in relief (height above a reference plane obviously, but maybe more subtle factors too) are captured in an analogue process to give variations in image intensity and subsequent 'apparent 3D' properties. That cannot happen if the medium transfer is too efficient at all points. So it may be necessary to include an additive, one that our medieval artisan might have included if only to make the adhesion weaker (he would not have been worrying about final 3D properties!).

Reverse-side imaging?  Yes, there's some at present, as the next pictures will show. But a medieval forger would probably not have wanted it either, if it gave the slightest clues to how an image was faked. This is where technology as distinct from science needs to be harnessed: finding simple ways of reducing or eliminating reverse-side imaging in the proposed flour/water model.

Here are some thoughts for a model system that focuses specifically on  efficacy of medium transfer as a function of 3D relief:

I would use the knuckles of my clenched fist as the 3D subject I'd paint the knuckles with various imprinting media (flour +/- milk +/- egg yolk etc) that had been coloured up with some ink or pigment, then press into fabric (probably re-using linen from previous experiments). The aim would be to find  a mix where the knuckles were imprinted more prominently than the rest of the fist, through having the highest relief. It would probably need to be a stiffish mix, whatever the ingredients, so as to avoid the mix being squeezed off the extremity down into the furrows between knuckles - not what one wants when trying to capture 3D relief!

Update Thursday 19:14


The footprint (mine!) top left was imprinted onto linen using a mix of white flour, egg tempera and a little milk. The image has been tone-reversed in ImageJ (bottom left).  The latter has then be 3D rendered (right).

The initial imaging was performed by standing on one foot, with a view to getting the best impression, but that was maybe not a good idea in retrospect: pressure would have forced the imprinting medium off the highest relief, eg the flat of the toes, resulting in less-than-satisfactory 3D-imaging.

Friday May 8

Here's the result of my fist-imprinting experiment. The result was disappointing, as will be seen, probably through an inappropriate choice of imprinting configuration (LUWU instead of LOTTO) that will not be repeated.  Iwill show it, however, and for 2 reasons. First, this is a real-time account of a research project, warts 'n' all. Second, as is so often the case in reseacrh, while an experiment may fail in its primary purpose, it can lead to unexpected and interesting side-observations. There was not just one, but two of those in the "Fist 1" so I'll now provide an, er, blow-by-blow account.

bbbb


Here's the consistency of the highest of 5 concentrations of flour/water dispersion tested.




Paint fist.

bbb






Press fist into strip of linen, starting at the far left.


bbb





Here's the imprint on the linen.


bbb

Now add a measured volume of water to the flour/water mix with stirring to make it less viscous.



bbb



Now repaint the fist with the runnier mix.

Repeat the process of diluting and re-imprinting 3 more times, working left to right along the strip.





Here's the final strip, with its 5 scarcely visible flour imprints. They will first be left to dry on radiator, and the linen then sewn to make a flat hoop, imprint on outside, to be suspended in nitric acid vapour over conc. nitric acid solution.





Here's the strip inside the 'developing tank', with a glass plate over the top. The clothes pegs were intended to keep the linen clear of the liquid acid.


In fact, one single linen thread had dangled down into the acid, drawing the latter up by capillary action.  A quick rep-adjustment put a stop to that, but the instant image development in the wet area gave an idea for another experiment, results of which will follow this one. The idea: to compare nitric acid vapour versus liquid solution as a developing agent.



Here was the linen after image development in nitric acid vapour, with the 5 fist imprints going from left to right.






Here's the same, with added yellow lines to act as dividers.


And here's the reverse side of the linen, with very little 'reverse-side image' - confirming that flour/water is a good imprinting medium in principle, despite there being much R&D still needed to produce a TS-like image.

Discussion

While the method works reasonably well for flat(tish)parts of the anatomy (see earlier results with the back of my hand, sole of foot) it does not like complex relief (face, clenched fist).

So those imprints above of my clenched fist are maybe difficult to recognize as such. But as hinted at earlier, it was a mistake  to have adopted the LUWU mode of imprinting. I had thought that passive pressure would give the simplest most recognizable imprint, but that was not to be, probably due to the right-angle turn at the knuckles , but other factors too, like excessive give in the underlay, and a possible rocking action. Never mind: the experiment yielded useful data in other respects as regards the possibility of using solution as a fast-acting alternative to vapour, and the virtual absence of reverse-side imaging.

The experiment also got me thinking about engineering the 'ideal' imprinting medium likely to yield the best 3D result.

The ideal mix will probably still flour as a major ingredient (large intact endosperm cells help reduce penetration and reverse-side imaging).  It will perhaps have egg tempera too, if only for its yellow colour, making it easy to know where to paint blood stains on top of body image. But it has (probably) to be paint-like in consistency and covering power, attaching first to skin, whether unwashed, with skin oils present, or washed (leaving unobstructed keratin, i.e. protein), but then transferring cleanly onto linen. There is now work to be done in identifying that mix, while at the same time maintaining credibility re the options that would have been considered in a medieval workshop.

Comparing nitric acid vapour and liquid solution as image developing agents






I reverted to LOTTO mode for this test. First paint back of hand with flour slurry (no additives).



Here again is that amazing 'cling film look one gets when placing linen on top, then pressing gently.


Here's the negative imprint - scarcely visible.


Now turn the imprint into a simple jigsaw puzzle. 2 pieces will developed in HNO3 vapour, two in conc HNO3 solution (70%).


Here I am adding the acid to one of those two pieces. Image development is seen almost immediately.




Here we are a few minutes later, with image development without noticeable leaching of colour, or migration from image to non-image areas. Success!



Here's the downside of using solution. There's a lot more acid that has to be neutralized before the linen can be removed for drying, ironing and photography.



here are the 4 developed pieces re-assembled. The image of the back of my hand is complete. There seems to be no reasons for thinking that vapour is superior to solution or vice-versa, at least where image-development is concerned.


And as before, there is scarcely any reverse-side coloration.

Next question: does one need concentrated nitric acid for development, if used as liquid? Might a lower concentration work too, albeit more slowly, but without the same degree of hazard?

Some quickie tests are in order, making serial dilutions of the conc acid, e.g. 70%, 35%, 17.5%, 8.75%  for a quick idea.

Come to think of it, use of nitric acid solution raises new technological possibilities. Let's suppose that the essential ingredient of the imprinting medium - provisionally white flour - is fixed instantly to the linen. But suppose there were additives in the medium that gave it a more functional paint-like consistency that were undesirable as left-overs in the final image. What is they were not fixed by the acid?  Maybe they could leach out into the liquid acid (not possible if vapour used), so that one was left with the just the chemical constituents needed for the 'right' kind of image.

Results: testing nitric acid solution as  developer, with a range of concentrations:



First, a paintbrush loaded with white flour dispersion was used to make a trellis pattern on linen. After drying squares were cut out for immersion in different concentrations of nitric acid solution.




Here are the squares in pots with the indicated concentrations of nitric acid (w/v). This was after about 30 minutes of contact. Pronounced orange colour has developed not only at the top concentration (70%), but at half that (35%) and half that again (17.5%). Only at the lowest concentration tested (8.75%) was there no unequivocal colour development.



Here are the same samples after 1 hour in acid, neutralization with sodium bicarbonate and partial drying on a towel.

Conclusion: the model works with nitric acid solution as well as vapour. What's more it's not necessary to use concentrated nitric acid (gives off fumes, hazardous).  It works well (and fast) with nitric acid diluted with water to 4 times its initial volume, i.e. to 8.75%, which  at approx. 2.75M is only a little higher than the concentration of bench dilute nitric acid (generally 2M).

Imaging of forefinger using the new quickie liquid developer (nitric acid SOLUTION) to compare different imprinting media.

Here's the final 3d-rendered image (posted first to allow transfer to shroudstory as progress updateI.






The stages in obtaining that image will be added later.

May 8, 19:12

The above 3D image was obtained while the test linen was still wet and drying on the radiator. (Man in a hurry).

The sample has now fdired and been pressed with a steam iron. Here are the definitive pictures:



The as-is imprints, after development in nitric acid solution.


As above, after tone reversal in ImageJ.  (A Secondo Pia transformation of a negative imprint back to a positive - or at least a pseudo-positive).



 
As above, after 3D rendering in ImageJ.

Now, back to the start:


Ready to start imprinting: flour slurry in the pie pot, egg yolk in the glass, and a 50/50 mix of the two in the egg cup.



After imprinting, drying on a radiator before chemical development. Note however the almost photograph like character of the egg yolk imprints, especially on the left. There's absolutely no reason why medieval folk should not have seen that kind of realistic imprint, albeit as a negative image. All that was need to produce trhe TS was to think up a way of fixing that egg yolk (or similar) image to make it permanent, maybe with some colour reinforcement.



And here's the new simplified image development step - simply immersing in nitric acid solution, 10% w/v and upwards. The lower end of the range is recommended to reduce fumes.

Update Saturday May 9

Feedback from Dan Porter's shroud story site (from Thibault Heimburger MD) and my response:

Thibault HEIMBURGER
May 8, 2015 at 4:52 pm
I have to admit that Colin’s work is very interesting.
In fact, it is the best work (still in progress) I ever seen, based on the “chemical imprint” hypothesis.
The fact is that the TS image is an “imprint”, not a paint, is obvious.
The fact that the TS image is a contact-only imprint rather than a contact+non-contact imprint is still undecidable.
Hopefully, at the end, we will see if the best contact-only hypothesis (the “chemical imprint”) can match or not at least the macro properties of the TS image.
Colin wrote (see his blog): “The task: produce a contact image that could be claimed to be that left by the crucified Jesus on Joseph of Arimathea’s ‘fine linen’.
Not only that.
The TS IS such an image. But this image has some fundamental properties.
So, we will see.
Sincerely, good luck.
May 9, 2015 at 12:07 am
Thanks Thibault. Your comment is most gratifying, and shows true generosity of spirit, given our differences in the past.
In an earlier comment here yesterday, I was deliberating on what should be the ideal consistency of the imprinting medium in order to achieve best 3D effects. I said it should be paint-like, i.e. tacky and viscous, so as to stay where applied on the 3D subject, since if runny, it would flow off the highest points of the relief down into the hollows and mess up the 3D rendering.
Oops. I was forgetting that gravity can be made to work for one. If you want a liquid imprinting medium to stay put on the highest relief, and indeed concentrate at the highest points, then turn the subject (or template) upside down before imprinting, and press it DOWN into linen.
There are two types of subject-to-linen presentation one can use when imprinting, what I have previously called LUWU (Linen Underneath, With Underlay) and LOTTO (Linen On Top, Then Overlay).
Use the LUWU configuration(even if easier said that done where real people are concerned). That requires painting the subject with imprinting material, then lying face DOWN into the linen to imprint the FRONTAL surface. If the medium is fairly runny and mobile, then in the brief time the subject positions himself face DOWN, the medium runs to the LOWEST points of the relief, due to gravity, which would have been the HIGHEST points when face up. It is the concentration of medium at the new lowest relief that might generate most if not all of the negative and 3D properties of the final 2D imprint.
OK, so it might be tricky to get a clean imprint via LUWU. However, the purpose in hinting at a gravity-aided model is not to suggest this was how imprinting was actually achieved, but simply to flag up the wealth of options on offer. Yes, one risks attracting unflattering references to Occam’s Razor. But having a range of options for modelling is not the same as needing to attach a host of qualifying assumptions to a model through having a limited range of options.


Further update Saturday May 9

Have just this minute taken a picture of the latest experiment in progress (imprinting off a plastic 'Galaxy Warrior" from Poundland), and inserted it as opening graphic (with a cut-and-paste to shroudstory which has just done an agreeable and benign cover on this posting).


Here's the same image after drying and pressing briefly with an electric iron:



Yes, as I said in the caption, the two heads - frontal v dorsal - should have been separated (a little) and the two images, frontal and dorsal, should have been perfectly aligned on the long axis.  As the sign used to say above the maintenance workshop at a student hall of residence I once stayed at: "The impossible we do immediately. Miracles take a little longer."

Update: 12May 2015

Here's a new result, hot from the press, correction, garage.



It's posted here first as a 'linkable' graphic. It will then be posted to Dan Porter's shroudstory site, so as to keep folk there in the picture. Where next? Maybe write a post on my  specialist shroud site that's been dormant since December last year, saying why I think this result is important. The colour you see in that pot with the handle, bottom left, may well be the one that is on the TS, albeit faded with time.

What's in the pot to give it that red-brown colour? It's the isolated gluten (the viscoelastic protein that is responsible for breadmaking dough) from wheat flour, washed free of its starch granules, then treated with nitric acid.  It's maybe a bit soon to be speculating on what is in wheat gluten protein to give so strong an orange colour with nitric acid (the so-called xanthoproteic test). My guess, for what it's worth, is the high tyrosine content of wheat gluten.  It readily nitrates with nitric acid to give the 'sepia' colour, as per TS.

The small glass dish on the right has the starch that was washed out of the wheat flour dough. It does NOT give the same red-brown colour, merely a faint yellow coloration, possibly, probably due to starch granule protein (friabilin etc, as discovered by my colleague Philip Greenwell at the previous FMBRA i.e. Flour Milling and Baking Research Association,   developer of the Chorleywood breadmaking process, now part of the Chipping Campden and Chorleywood Food Research Association

Posted to shroudstory:


 
May 12, 2015 at 12:13 pm
It says “figured out, sort of maybe” in the title. Might I humbly suggest there’s a bit less “maybe” now.

That’s isolated wheat flour gluten in the bowl at the back. That’s a portion of it treated with nitric acid to get the sepia (red-brown) TS-like colour in the dish bottom left. That’s the flushed-out, then gravity-sedimented starch fraction in the glass dish on the right, also treated with nitric acid, with faint yellow coloration only.
Why should wheat gluten (the protein fraction) of flour produce a orange colour with nitric acid? Answer: it’s almost certainly due to its high content of the phenolic amino acid tyrosine that readily nitrates with nitric acid in the so-called xanthoproteic reaction (used as a test for proteins).
In other words, the TS sepia colour is NOT due to dehydrated, oxidized carbohydrates, as suggested in the STURP summary. It’s due to nitrated protein formed by secondary chemical development with nitric acid of a contact imprint made from a human subject (dead or alive) using a slurry of white flour as imprinting medium.