Figure 6
From: Investigation of the painting materials in Zhongshan Grottoes(Shaanxi, China)
Photographic documentation of samples S3, S4 and S5. a) and b) Sampling locations, c) and d) VIS- and UV-photomicrographs of sample S3, e) and f) VIS-photomicrographs of samples S4 and S5 respectively.