The lab representatives were not present at this packaging process, in accordance with the protocol.
The labs were also each given three control samples (one more than originally intended), that were: and communicated their results to the British Museum.
As reported in Nature, Professor Bray of the Instituto di Metrologia 'G.
Colonetti', Turin, "confirmed that the results of the three laboratories were mutually compatible, and that, on the evidence submitted, none of the mean results was questionable." 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.
On 12 December 2003, Rogers received samples of both warp and weft threads that Prof.