Fig. 6From: Developing a non-invasive tool to assess the impact of oxidation on the structural integrity of historic wool in Tudor tapestriesFTIR spectra of a historic yarn (black solid line), an artificially light aged yarn (black dotted line) for 600 h at 150,000 lx and an unaged undyed yarn sample of wool (grey dashed line). Normalized to 1232 cm−1 amide III peakBack to article page