|Colour Index ||PB 28 |
|Drying Speed ||Very Fast |
|Opacity Covering and Tint Power ||Semi-Opaque |
|Lightfastness ||Excellent |
|Oil Content ||Average, Linseed |
|Toxic ||No |
|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.