Fig. 5

Photomicrographs of paint-cross sections taken in the 1968 study by Hermann Kühn, approximately from the locations indicated in Fig. 3a. Sample FC5a, taken with visible (a) and with UV illumination (b), original magnification ×200, and electron backscattered image, x611 (c); sample FC7a, taken with visible (d) and with UV illumination (e), original magnification ×200, and electron backscattered image, ×639 (f); and sample FC9a taken with visible (g) and with UV illumination (h), original magnification ×500, and electron backscattered image, ×705 (i)