However you may feel about the sturp group, there is one thing that they confirmed for sure and it is that it was definitely the image part of the shroud that was darkened (dehydrated!), and not the other way around, as it is the case with the shadowshroud experiments. The image is actually pixelated, it is made up of tiny dots, and their density defines the local darkness of the image.
Shroud of Turin Blog – 15 Mar 14
discontinuities, striations, halftones and pixels Colin Berry in his most recent posting used the term half-tone and I was reminded of an email I wrote to Ray Rogers that had I posted to the Shroud…