"Cobalt Chromite is used for its excellent weatherability"

Often used as a substitute for the historically authentic azure blue Cerulean Blue (PB35, Cobalt Stannate) PB 36 Cobalt Chromite Blue-Green Spinel), in some cases even claiming that this variant is the "authentic", however C.I. Pigment Blue 36 is not the traditional pigment called Cerulean Blue PB-35;

Cobalt-chrome blue-green Co(Al,Cr)2O4 is obtained by calcining at greater than 1350 ° Celsius a mixture of cobalt (II) oxide, chromium (III) oxide and aluminum (III) oxide in various ratios, forming a crystalline spinel matrix. It may also contain one or more modifiers ZnO, MgO, SiO2, TiO2 and/or ZrO2 to adjust the color shade or other properties.

Undesirable mixtures of oil cobalt paints:

• mixtures of cobalt violet and blue with lead white are not recommended;

• all cobalt paints are not recommended to be mixed with ultramarine, madder, Van Dyck, as well as with black soot pigments taken in small concentrations (less than 1:10);

• mixtures with madder and lead white are not recommended (the former are destroyed, and the latter darken).

Chemical composition: cobalt aluminate chromite

Chemical formula: Co (Al, Cr) 2O4

Heat resistance, °C 1000

•ColorIndex PB 36

•Alkali resistance: 5

•Lime resistance: 5

•Acid resistance: 5

•Lightfastness - 8

•Opaque

•Suitability Acrylic, Fresco, Tempera, Watercolor / Gouache, Silicate binder

•Color blue-green

•Form powder