Introduction To Inorganic Pigments

Inorganic pigments are oxides of non-ferrous metals, or some metal insoluble metal salts. Inorganic pigments are divided into natural inorganic pigments and artificial inorganic pigments. Natural inorganic pigments are mineral pigments.
Pigments made from natural minerals or inorganic compounds. Natural mineral pigments generally have lower purity and darker color, but they are cheap. The synthetic inorganic pigments have a complete spectrum of varieties, bright and pure colors, and strong hiding power.
Humans have used inorganic pigments very early, and soot, chalk, colored earth, and natural iron oxide have been used as pigments in prehistoric times. From 3000 BC to 2000 BC, the production method of lead white was mastered. Around 200 BC, China used artificially refined silver vermilion (HgS) as a pigment. In 1704, Diesbach in Germany invented the production method of the color pigment Prussian blue [a dark blue pigment, the main component is Fe4 [Fe(CN)6] 3 xH2O]. In 1809, French L.-N. Vauqueland made chrome yellow. In 1831, French I.B. Guimet built a factory near Lyon to produce ultramarine blue. In 1874, the Widnes factory of the British Austen Zinc White Company produced lithopone. In 1916, titanium composite pigments (containing TiO225%) and pure titanium dioxide (titanium dioxide) were put into production in 1923, which made a big step forward in the production level of pigments. The color spectrum of inorganic pigments is basically complete.