The article has given rise to a lot of interest and outside the authenticists’ websites very positive. For those who read the original to the end, you will see I never argue that the Shroud was a fake. There were hundreds of thousands of painted linens around in the medieval period and they were widely used in churches, especially during Lent when opulent altars and statues were traditionally covered up.
If you were a forger hoping to get away with a burial shroud you would stick to the gospel sources and certainly not add images. The most successful shroud relics in the medieval period were single cloths WITHOUT images – better still if you brought yours back from the Holy Land.
The Quem Queritis Easter ceremony when they held up a cloth from a makeshift ‘tomb’ to show that Christ had risen is the best fit explanation for the origins of the Shroud. We know that the linen was often painted and a single sheet.
I have never seen anyone except David Roehmer put forward this second century Gnostic theory – so I don’t know what historical or scientific work he is relying on.
When you wanted to paint a linen in medieval times, you gessoed it on the surface and once it was sealed then you painted on top. Some of the few surviving examples are vastly more sophisticated than the Shroud ever was. The trouble was that the painted surface easily disintegrated although the Shroud seems to have kept pretty intact until the nineteenth century. The present discoloration of the linen appears to be the result of centuries of the weave being overlain by the gesso and paint. It is only a surface disoloration – presumably the gesso stopped the images penetrating further – and the varying thicknesses of the original paint left a sort of negative image behind. It is all too often assumed that the images left today are the images that were originally created and all kinds of ingenious methods, from laser beams to scorches, have been devised to recreate them – but you would have to seal and paint the linen according to the medieval manuals and leave it in place for several centuries and then when it disintegrated we would probably have similar images. See you in 500 years time!