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Fig. 5 | Heritage Science

Fig. 5

From: Developing a non-invasive tool to assess the impact of oxidation on the structural integrity of historic wool in Tudor tapestries

Fig. 5

a NIR sampling area from “the meeting of Abraham and Melchizedek” in the GH. b The sampling points within the area are numbered 1–5. c A microscopic image of the sampling area taken using a DinoCapture® 2.0 digital microscope. At each point, 3 NIR spectra were recorded, background subtracted and averaged. d Raw averaged spectra for 5 of the points (images courtesy of Historic Royal Palaces)

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