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.
Democratic Republic of the Congo
There are economic and strategic incentives to bring more security to the Congo, which is rich in natural resources such as cobalt, a strategic and critical metal used in many industrial and military applications. The largest use of cobalt is in superalloys, used to make jet engine parts. Cobalt is also used in magnetic alloys and in cutting and wear-resistant materials such as cemented carbides. The chemical industry consumes significant quantities of cobalt in a variety of applications including catalysts for petroleum and chemical processing; drying agents for paints and inks; ground coats for porcelain enamels; decolourisers for ceramics and glass; and pigments for ceramics, paints, and plastics. The country contains 80% of the world's cobalt reserves.