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Burnt Umber (C024)
ACMI Tox Rating: CL
CI Name: PBr7, PBk9
Chemical Description: Calcined Natural Iron Oxide containing Manganese Amorphous Carbon produced by charring Animal Bones
Lightfast Rating: I
Opacity: O
Description: A dark brown clay pigment made by heating umber, this dark reddish brown is good for underpainting, tinted grounds, flesh tones, earth, hair, etc.
reference: www.grumbacherart.com