Figure 7
PLM and cross-section photomicrographs of the samples. The cross-section photomicrographs of sample gx-10 a (a): (1) thin and uncontinuous black layer, (2) dark blue layer, (3) green layer; sample gx-8 (e): (1) brown layer, (2) red layer; sample zx2-5 (f): (1) red layer, (2) orange layer; sample gx-11 (g): (1) red layer, (2) blue layer; sample zd-2 (h): (1) gold leaf, (2) brownish red binding media layer, (3) red particles. PLM photomicrographs of sample gx-15 (b) showing the blue pigment of Prussian blue, sample zx1-8 (c) showing the blue pigment of smalt and sample zx1-6 (d) showing the green one of atacamite.