Cobalt blue
Cobalt blue in impure forms had long been used in Chinese porcelain, but it was independently discovered as a pure alumina-based pigment by Louis Jacques Thénard in 1802. Commercial production began in France in 1807. The first recorded use of "cobalt blue" as a color name in English was in 1777. The leading world manufacturer of cobalt blue in the 19th century was Benjamin Wegner's Norwegian company Blaafarveværket ("blue colour works" in Dano-Norwegian). Germany was also famous for production, especially the blue colour works ("Blaufarbenwerke") in the Ore Mountains of Saxony.
Blue and white pottery
In the early 14th century, mass-production of fine, translucent, blue and white porcelain started at Jingdezhen, sometimes called the "porcelain capital" of China. This development was due to the combination of Chinese techniques and Islamic trade. The new ware was made possible by the export of cobalt from Persia (called "Huihui qing", , "Islamic blue"), combined with the translucent white quality of Chinese porcelain. Cobalt blue was considered as a precious commodity, with a value about twice that of gold. Motifs also draw inspiration from Islamic decorations. A large portion of these blue-and-white wares were then shipped to Southwest-Asian markets through the Muslim traders based in Guangzhou.