Raw Umber (C172)

ACMI Tox Rating: AP
CI Name: PBr7, PBk9
Chemical Description: Natural Iron Oxide containing Manganese, Amorphous Carbon produced by charring Animal Bones
Lightfast Rating: I
Opacity: O

Description: A traditional deep brown earth color, it is one of the few colors that is warm in mass tone and cool when diluted with white. A universal earth tone excellent for glazes, brunaille, shadows, etc.

reference: www.grumbacherart.com