One story I read was the body was dusted with iron oxide and the cloth laid on top - but - no matter how carefully you do it you still will move the cloth blurring parts of the contact. The book “Skeleton Key” has a provocative epilog (all points easily refuted.).
Bflr.
There is another problem with the iron oxide theories of image formation. Samples taken from the Shroud have been examined down to electron microscopic levels and Electronmicrospectrometry has been done on those samples. This is a test that is so accurate that it was able to discern the elements that made up the composition of the residue left on the samples from the vinyl baggies the samples were placed in after being taken from the Shroud to the point of being able to tell which manufacturer made the baggies! SkyDancer, there was no Fe2O3 Red Iron Oxide, or Fe3O4 or Black Iron Oxide, the naturally occurring forms of Iron Oxide, nor was there any Vermillion, HgS, the other red color which those claiming paint or dusting as a pigment on the Shroud, usually for the blood coloring.
While each of these pigments was found on the Shroud, it was deemed environmental contamination, evenly distributed across the entire Shroud with no concentration in the area of image and none rising to the level of visibility. The contamination most likely occurred when painted copies of the Shroud were pressed to it to sanctify the copy. There are at least 30 known copies that may have been sanctified in such a manner and records indicate that at least some of them were sanctified in such a manner.