Spinel black
Composition and Properties of Spinel Black
Spinel black belongs to the spinel group of compounds which are mixed oxides of metals. Spinel black is a manganese-iron spinel with a formula of MnFe2O4. It is the blackest of all known pigments except for the recently produced Vantablack. The much better-known pigment cobalt blue is a cobalt-aluminum spinel with the formula of CoAl2O4 which belongs to this group as well. The pigment is absolutely stable, has excellent lightfastness and is compatible with all other pigments.
Names
PBk 26, CI 77494From French spinelle, from Italian spinella, diminutive of spina thorn. From Oxford dictionary
Preparation
The pigment can be prepared by heating of the oxides, hydroxides or carbonates of the two metals iron and manganese to a temperature of 1000 – 1400 °C.
History of Use
The pigment has first been prepared in the 19th-century.
