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.
Pigment Classification : Inorganic
Color Index Name : PBr 7
Color Index Number : 77492
Chemical Description : Natural Iron Oxide containing Manganese
Opacity/Transparency : 1
Lightfastness Rating : I
Permanency : Excellent
Munsell Notation Listing :
Hue 3.0 Y
Value 2.5
Chroma 1.3
Hue 3.0 Y
Value 2.5
Chroma 1.3
Gloss Average : 16.59
Viscosity Range : 400-1000 CPS
CIE L*a*b* Values : L*29.25 a*1.04 b*2.67
Tint Strength : 76.39
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