Umber is essentially clay, and this variation on the PBr7 pigment is the lighter (un-burnt) version of this classic earth tone that originated in the Umbria region of Italy. (Series 1)
Pigment Classification: Natural Inorganic
Color Index Name: PBr7
Color Index Number: 77492
Chemical Description: Natural Iron Oxide containing Manganese
Opacity/Transparency: Opaque
Lightfastness Rating: 1
Permanency: Excellent
Munsell Notation Listing: Hue 3.0 Value 2. Chroma 1.3
Gloss Average: 16.59
Viscosity Range: 23000- 27000 CPS
Tint Strength: 76.39