Carbon dating real fake
Although some claim the shroud impression contains human blood, that contention has never been proved by science, and the trickles of blood on the head appear to confirm that the image is a forgery, as the blood would have been matted in the hair, not running down the scalp.
As concerns the so-called blood purportedly on the shroud, CSICOP says: BLOOD.
Carbon-14 dating has demonstrated that the shroud is a 14th-century forgery and is one of many such deliberately created relics produced in the same period, all designed to attract pilgrims to specific shrines to enhance and increase the status and financial income of the local church.The Associated Press reported claims that the shroud bears type AB blood stains.Perhaps this erroneous information has its origin in other fake shrouds of Jesus, since the Shroud of Turin's stains are not only suspiciously red (unlike genuine blood that blackens with age) but they failed batteries of tests by internationally known forensic experts.The shroud cloth was radiocarbon dated to circa 1260-1390 by three separate laboratories.
The date is consistent with a fourteenth-century bishop's report to Pope Clement VII that an earlier bishop had discovered the forger and that he had confessed.The "blood" has been definitively proved to be composed of red ocher and vermilion tempera paint." There remains a debate among the faithful, however, as to the nature of the supposed paint or pigments and whether or not they are present on the shroud.