Hi,

I found one interesting article and abstract of which I copy below,
please take a look for your comments !!!

Best Regrads,

Hannu Poropudas

------------------------------------------------------------COPY
BELOW--------------------------------------------------------------------

In 1988, radiocarbon laboratories at Arizona, Cambridge, and Zurich
determined the age of a sample from
the Shroud of Turin.

They reported that the date of the cloth's production lay between A.D.
1260 and 1390 with 95%
confidence.

This came as a suprise in view of the technology used to produce the
cloth, its chemical composition,
and the lack of vanilin in its lignin.

The result prompted questions about the validity of the sample.

Preliminary estimates of the kinetic constants for the loss of vanilin
from lignin indicate
a much older age for the cloth than the radiocarbon analyses.

The radiocarbon sampling area is uniquely coated with a yellow-brown
plant gum containing
dye lakes.

Pyrolysis-mass-spectrometry results from the sample area coupled with
microscopic and
microchemical observations prove that the radiocarbon sample was not
part of the original
cloth of the Shroud of Turin.

The radiocarbon date was not valid for determining the true age of the
shroud.

(This is copy of the Abstract of the reference:
Rogers,R.N. 2005.
Studies on the radiocarbon sample from the shroud of turin.
Thermochimica Acta, 425, (2005), 189-194. )
---------------------------------------------------------------------------------------------------------------------------------