[kik5150]

The image is not created from a dye or pigment. The film of soapwort on the surface of the linen has been caramelized in a dot-matrix pattern to form the image. Heat alone could not cause this as there is no evidence of scorching in the fibers of the cloth.

[TXnMA]

Reference re the "caramelization" of the soapwort and, especially of the digital ("dot matrix") nature of the print, please...

I provided a possible analog (not digital) explanation of a molecular coating being projected from a shaped surface, (the body) and producing a 3-D, continuous tone (not half-tone, as you describe) negative image.

But, then, I'm just a believer in Christ, who is also a physical chemist with a background in digital (and analog) imaging at semiconductor scales...

References...?

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(bb & A-G: "backtrack" to #s 32 & 24 for "the rest of the story"...)