Raw Umber: Vigorous drier due to high manganese content (which also gives Umbers their dark color).
Pigment: Natural iron oxide containing manganese (PBr 7)
Vehicle: Alkali refined linseed oil Lightfastness I, Series 1, SEMI-TRANSPARENT
Raw Umber: Vigorous drier due to high manganese content (which also gives Umbers their dark color).
Pigment: Natural iron oxide containing manganese (PBr 7)
Vehicle: Alkali refined linseed oil Lightfastness I, Series 1, SEMI-TRANSPARENT