Were the images painted?
In a word, no!
Walter McCrone (1916-2002), claimed that he found red ochre (hematite) and vermilion (mercuric sulfide). These are common medieval paint pigments. He was thus able to argue that the Shroud was painted.
That claim has since been proven wrong. Scientists are quite certain about the chemistry of the images, and they are not the inorganic compounds McCrone saw through the lens of his microscope. The images are clearly and demonstrably the result of a chemical change either to the fibers themselves or to an organic material on the fibers that was there before the images were made.
- Didn't Ray Rogers provide a definitive answer about paint?
- Didn't Walter McCrone also claim that the Vinland Map was a fake?