Unfortunately, Dentist, the carbon14 tests, which were done by three seperate labs, were done on four pieces taken from the single sample taken from only ONE area of the shroud... one which the creators of the protocol specifically excluded... instead of the SEVEN areas the original protocol required.
The Arizona lab got TWO pieces, the other labs got one each. Strangely the piece that tested youngest and the piece that tested oldest BOTH were sent to Arizona... and the results for one were outside the extreme limits of the other. This would not be the case if the materials were the same age... or composed of the same ratios of replaced material to original material.
Since we can look at magnifications of photographs of the original sample (destroyed in the C14 testing) and estimate the percentage of "invisibly rewoven linen" from the obvious change of thread twist, we can make a stab at calculating the age of the original material. That calculation comes out to 1st century plus or minus 100 years (large margin of error because of the estimation of percentage). The ideal solution is to repeat the C14 tests using material that is certain to be original shroud and not a repair. Unfortunately, the Catholic Church has not authorized another test.
I have heard that an unauthorized C-14 test on a thread taken from Max Frei's sticky tape samples WAS done and the results pointed to a date in the First Century. Because it was not authorized, it cannot be published or peer reviewed so the results are not to be considered "valid."