Ultramarine Blue

 great glazing color, warm Ultra Blue is one of the few mineral colors that is completely transparent. Lightfast with moderate tinting strength. Consider using Alizarin Permanent instead of Alizarin Crimson to mix violets.

Pigment: Complex silicate of sodium & aluminum with sulfur (PB 29)
Vehicle: Alkali refined linseed oil
Lightfastness I, Series 2, TRANSPARENT, SDS