Fig. 7
BSE and optical microscopy images of cross section S11 (likely original and overpainting reds). a BSE image of cross section S11, i.e. multi-layered red paint removed from the sphere’s red flange, revealing seven layers of likely original paint and overpaint. b Polarized and (c) UV light photographs of the same cross section, displaying different orange and red shades as well as fluorescence emission colors and intensities for the various paint layers