Posts Tagged ‘Mark Evans’

Those Dark Specks in the Mark Evan’s Photographs

October 31, 2014 33 comments

that unforgivable hoovering

Colin Berry, with his non-stop observant and inquisitive mind:

Am I not correct in thinking that there are dark specks associated with the tan-coloured areas, which are unlikely to be artefactual (chance deposits of dust etc) given they are absent for all intents and purposes in the less-strongly coloured non-image areas?
Flour particles, toasted?

(click on picture to see enlarged version)

A working hypothesis:

Working hypothesis. There are (or were, before the 2002 conservation measures, including that unforgivable hoovering) a scattering of dark-coloured particles on the TS concentrated mainly in the image-bearing regions, with far fewer in non-image regions.

An analysis of those particles would show them to be a substance that has been rendered yellow or brown by thermal energy ("heat" in common parlance). A possible candidate might be white flour particles  – an intentional additive – one that  acquired colour via a Maillard reaction, thus contributing to the image-forming process and  hence its heterogeneity and complexity.

Do they match what we see in the Mark Evans pictures?

As ever, more and more work beckons. First, one will need to do microscopy on the flour-coated  imprinted linen to see what happens to the appearance of individual flour particles, and whether or not they match the specks one sees in the above Mark Evans pictures, at least in terms of size.

And what did McCrone see?

Then comes the difficult part: to track down such papers are available online from the Walter McCrone Microscopy Institute on the studies he did on sticky-tape samples supplied by Ray Rogers. I definitely recall seeing one summary that had a long long list of the different types of particle he had identified.

One wonders what he would have made of those dark specks we see above if indeed they were flour or some other ‘food’ type particle that had undergone a Maillard reaction. One imagines it would take some fairly sophisticated kind of spectrographic microscopy  to make a positive identification, but that is not my area, so there’s a steep learning curve that will need to be climbed to make headway.

Photomicrographs and Stochastic Imaging

June 17, 2014 23 comments

imageColin Berry in his blog tells us that Thibault Heimburger is correct – Shroud photomicrographs lend no support to the notion of a ‘stochastic’ imaging mechanism.  Colin writes:

So where does Thibault Heimburger MD, Paris-based French physician and member of the Shroud Science Group enter this story? Some might be surprised to find his views being favourably received on this site, given there is so much on which we differ, notably the contact scorch hypothesis (one that TH rejects). But that does not mean he’s wrong – or right- on everything, far from it, as my follow-up to a recent comment on his on will now show.

TH appeared on the recent thread, the latter flagging up the presence of a Fazio et al  paper recently published in Mediterranean Archaeology and ArchaeometryHe queried the claim (or supposition?) that yellowed  fibres were randomly distributed across Shroud image-bearing regions, stating that they could appear together in bundles  . . . . Were that correct, it would deal a devastating blow to any theory that required the coloured fibres to be randomly distributed (though occasional clumping is not totally ruled out, albeit being of low expected frequency).

You are going to want to read Colin’s posting. Now we just need to hear from Thibault.

imageNote about the image:  The above image is ME-29, a 64x photomicrograph of a part of the nose area by Mark Evans. CLICK HERE or on the picture to enlarge it to 1088 by 770. Because I am hot-linking to the image as it is stored in Colin’s blog, it appears as a properly proportioned rectangle. For some reason it has been distorted into a 320 by 320 square in Colin’s blog (not that this seems to make any difference for the purpose at hand).  According to the gallery of images, the original size is 2940 by 1984.

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