Blue flag with yellow tiger? Flags, authenticity and identity

A literature review of analytical techniques for materials characterisation of painted textiles—Part 1: categorising painted textiles, sampling and the use of optical tools

“…71 UV fluorescent microscopy has been used to show the presence of a ground layer not seen under visible light, 72 and Lennard et al analysed samples under normal and ultraviolet light at ×50-×400 magnification to determine differences between pigments and when they were painted to determine later alterations to inform decisions about which repairs should be retained. 73 Furthermore, Takami and Eastop and Takami and Wyeth were able to determine the precise layer sequence on both sides of the textile of a Korean banner using UV microscopy. They found was no sign of sizing and the textile was painted on both sides with a white ground layer thought to be unusual for Asian painting and may have been used to clarify details.…”