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Burnt Sienna (C023)
ACMI Tox Rating: AP
CI Name: PBr7, PBk9
Chemical Description: Calcined Natural Iron Oxide containing Manganese Amorphous Carbon produced by charring Animal Bones
Lightfast Rating: I
Opacity: T
Description: An iron oxide pigment formed by burning raw sienna, this versatile reddish brown is used for underpainting, creating a ground color, flesh tones, earth, wood, hair, etc.
reference: www.grumbacherart.com