There was a photograph in this week's Weekly Mail and Guardian of the
"shroud" produced by Nick Allen of Port Elizabeth Technikon. Made
using light-sensitive materials readily available in the Middle Ages
by a kind of camera obscura method, Dr Allen produced a negative
photographic image on a cloth of a man, using a three day exposure.
He then used another process to remove all traces of the chemicals,
leaving an image that appeared to have been "scorched" onto the
surface. I'm not sure if Nick Allen was mentioned in the previous
discussion on the Shroud, but he has a web site at:
http://www.petech.ac.za/Shroud
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