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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. (Series1)
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Pigment Classification:åÊNatural Inorganic
Color Index Name:åÊPBr 7
Color Index Number:åÊ77492
Chemical Description:åÊNatural Iron Oxide containing Manganese
Opacity/Transparency:åÊOpaque
Lightfastness Rating:åÊI
Permanency:åÊExcellent
Munsell Notation Listing:åÊHue 3.0 Y Value 2.5 Chroma 1.3
Gloss Average:åÊ16.59
Viscosity Range:åÊ23000- 27000 CPS
CIE L*a*b* Values:åÊL*29.25 a*1.04 b*2.67
Tint Strength:åÊ76.39
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