It is claimed that there is type AB blood on the shroud. Blood has not been identified on the shroud directly, but it has been identified on sticky tape that was used to lift fibrils from the shroud. Other tests by Adler and Heller have identified it as blood.* If it is blood, it could be the blood of some 14th century person.It could be the blood of someone wrapped in the shroud, or the blood of the creator of the shroud, or of anyone who has ever handled the shroud, or of anyone who handled the sticky tape.The shroud allegedly was in a fire during the early part of the 16th century and, according to believers in the shroud's authenticity, that is what accounts for the carbon dating of the shroud as being no more than 650 years old.
It is said to have been in the chest when it was opened in 1075.Vermilion paint, made from mercuric sulphide, was then splashed onto the image's wrists, feet and body to represent blood." Mc Crone analyzed the shroud and found traces of chemicals that were used in "two common artist's pigments of the 14th century, red ochre and vermilion, with a collagen (gelatin) tempera binder" (Mc Crone 1998).He makes his complete case that the shroud is a medieval painting in Judgment Day for the Shroud of Turin (March 1999).A weight of 20th century carbon equaling nearly two times the weight of the Shroud carbon itself would be required to change a 1st century date to the 14th century (see It may interest skeptics to know that many people of faith believe that there is scientific evidence which supports their belief in the shroud's authenticity.
Of course, the evidence is limited almost exclusively to pointing out facts that would be true the shroud were authentic.
For his work, Mc Crone was awarded the American Chemical Society's Award in Analytical Chemistry in 2000.