Fig. 8

Cross-sections of paint samples. Sample S1, taken from the red tablecover, at the right perimeter of the painting, photographed with visible (A) and UV illumination (B), original magnification  ×400; and SEM-BSE image, × 400 (C). Sample S2, taken from the red tablecover in an area where the desk below is decorated with gilt ormolu, photographed with visible (D) and UV illumination (E), original magnification × 400; SEM-BSE image,  × 460 (F). The locations where these samples were taken are indicated in Additional file 1: Figure S5