'Older date' "The fact that vanillin cannot be detected in the lignin on shroud fibres, Dead Sea scrolls linen and other very old linens indicates that the shroud is quite old," Mr Rogers writes.
"A determination of the kinetics of vanillin loss suggests the shroud is between 1,300 and 3,000 years old." In the 1988 study, scientists from three universities concluded that the cloth dated from some time between 12.
The 4m-long linen sheet was damaged in several fires since its existence was first recorded in France in 1357, including a church blaze in 1532.
It is said to have been restored by nuns who patched the holes and stitched the shroud to a reinforcing material known as the Holland cloth.
This is what Wikipedia says " Although the quality of the radiocarbon testing itself is unquestioned, criticisms have been raised regarding the choice of the sample taken for testing, with suggestions that the sample may represent a medieval repair fragment rather than the image-bearing cloth.