This one?
https://en.wikipedia.org/wiki/Shroud_of_Turin#Material_chemical_analysis
In 2013, Giulio Fanti performed new dating studies on fragments obtained from the shroud. He performed three different tests including ATR-FTIR and Raman spectroscopy (absorption of light of different colors). The date range from these tests date the shroud between 300 BC and 400 AD.[ These studies have been publicly disregarded by Cesare Nosiglia, archbishop of Turin and custodian of the shroud. Cardinal Nosiglia stated that "as it is not possible to be certain that the analysed material was taken from the fabric of the shroud no serious value can be recognized to the results of such experiments".
“on fragments obtained from the shroud.’
when obtained?
from where on the shroud?
or left overs cut from the corner piece previously mentioned?
info you quoted doesn’t really conclude anything with out more specifics. the sentence doesn’t even specify what shroud he tested, just “the shroud” so the reader has to consider they mean the shroud of Turin.