Rublev Colours Pigment Ardennes Burnt Umber - 4 oz

Umber is a yellowish brown to greenish brown mineral pigment used in tempera, oil and watercolour, obtained from natural earths coloured by the oxides of iron and manganese. Just as with sienna, the chemical composition of umber is closely related to its iron oxide content. What makes umber different is the increased content of manganese. Other substances naturally occurring in umber, include clay, talc, and calcium carbonate, do not affect its colour greatly. Umbers with the highest tinting strength are those with the highest content of iron and manganese.

Warning: Umber is considered non-toxic, however, manganese, a constituent of umber, is considered moderately toxic, so care should be exercised when handling the dry powder pigment so as not to inhale the dust.