Fig. 6From: Blue pigments in Cave 256, Mogao Grottoes: a systematic analysis of murals and statues in Five dynasties, Song Dynasty and Qing DynastyPolarized microscope photos of blue pigments used in different dynasties in Cave 256. a, b blue pigment used in the Five Dynasties; c, d dark blue pigment used in the Song Dynasty; e, f blue pigment used in the statue in the Qing DynastyBack to article page