|Colour Index||PB 28|
|Drying Speed||Very Fast|
|Opacity Covering and Tint Power||Semi-Opaque|
|Oil Content||Average, Linseed|
|Conforms To||ASTM D-4236|
Introduced at about the same time as Ultramarine, Cobalt Aluminate is a synthetic inorganic pigment. It is a more greenish blue, with a heavier, more mineral appearance when seen as dry pigment. The hues formed from it are correspondingly heavier and greyer. But it has a certain shade which the less expensive ultramarine cannot quite match. The paint film when cured is quite soft.