Carbon dating test shroud turin
It is hypothesised that the sampled area was a medieval repair which was conducted by "invisible reweaving".
Since the C14 dating at least four articles have been published in scholarly sources contending that the samples used for the dating test may not have been representative of the whole shroud.
The medieval repair argument was included an article by American chemist Raymond Rogers, who conducted chemical analysis for the Shroud of Turin Research Project (STURP) and who was involved in work with the Shroud since the STURP project began in 1978.
The main part of the shroud does not contain these materials." He speculated that these products may have been used by medieval weavers to match the colour of the original weave when performing repairs and backing the shroud for additional protection.They viewed the fragment using a low magnification (~30×) stereo microscope, as well as under high magnification (320×) viewed through both transmitted light and polarized light, and then with epifluorescence microscopy.They found "only low levels of contamination by a few cotton fibers" and no evidence that the samples actually used for measurements in the C14 dating processes were dyed, treated, or otherwise manipulated.The origins of the shroud and its images are the subject of multiple fringe theories.Diverse arguments have been made in various publications claiming to prove that the cloth is the authentic burial shroud of Jesus, based on disciplines ranging from chemistry to biology and medical forensics to optical image analysis.
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The Holy See received custody of the shroud in 1983, and as with other relics, makes no claims about its authenticity.