Adrie van der Hoeven has published a lengthy article, Internal selvedge in starched and dyed temple mantle – No invisible repair in Turin Shroud – No Maillard reaction on the Holy Shroud Guild website. I have not read it but I picked out this concluding paragraph under Discussion on page 33:
The physical, chemical, and microscopical data of the radiocarbon sample area show no signs of a repair or inexplicable differences with the main Shroud, and even indicate that the sample area and main Shroud are one cloth and that this cloth most probably was a first-century Jewish temple garment. As an invisible 16th-century repair of the Shroud seems to be precluded, another explanation of the reported medieval radiocarbon date of a first-century cloth might be found. Antonacci reported an experiment showing that ancient linen is radiocarbon-juvenized by neutron irradiation. Di Lazzaro reported experiments showing a Shroud-like coloration of linen can be created by VUV-irradiation. Fanti reported experiments showing that a Corona Discharge (an electrical discharge naturally accompanied by particle- and VUV-irradiation) can create Shroudlike images, which fit the characteristics of the Shroud’s superficial body images better than (results of) all other proposed image formation processes do. Di Lazzaro invited Ramsey, director of the Oxford Radiocarbon Accelerator Unit, to collaborate in a team to study the Shroud’s radiocarbon dating results. Such a collaboration could produce very interesting insights.