Cobalt Blue (No. 506)

Michael Harding Cobalt Blue artist's oil paint

 

 

 

 

Inorganic

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.