“…[3] Since the mid-20th century, many analytic methods, including μ-XRF, SEM-EDS, Raman spectrometry, XAFS, LA-ICP-MS, etc., were performed to study the blue decoration of Chinese Qinghua porcelain for discussing the provenance of cobalt sources and the chromogenic mechanisms. [4][5][6][7][8][9][10][11][12][13][14][15] In a great degree, it has deepened the research of Chinese ancient Qinghua porcelain and answered many important archeological questions. The dark crystal spots, which commonly appeared in the blue decoration of some types of Chinese Qinghua porcelain, contained lots of information on the cobalt pigments and the manufacture of blue decorations.…”