Raw Umber

Umber \Um"ber\, n. [F. ombre ocherous ore of iron, terre d'ombre, It. terra d'ombra, literally, earth of shadow or shade, L. umbra shadow, shade. Cf. Umber , 3 & 4, Umbrage .] 1. (Paint.) A brown or reddish pigment used in both oil and water colors, obtained from certain natural clays variously colored by the oxides of iron and manganese. It is commonly heated or burned before being used, and is then called burnt umber ; when not heated, it is called raw umber . See Burnt umber , below.
2. An umbrere. [Obs.]
3. [F. ombre, umbre, L. umbra.] (Zo["o]l.) See Grayling , 1.
4. [Cf. NL. scopus umbretta, F. ombrette; probably fr. L. umbra shade, in allusion to its dark brown color. See Umber a pigment.] (Zo["o]l.) An African wading bird ( Scopus umbretta ) allied to the storks and herons. It is dull dusky brown, and has a large occipital crest. Called also umbrette ,umbre , and umber bird .
Burnt umber (Paint.), a pigment made by burning raw umber, which is changed by this process from an olive brown to a bright reddish brown.
Cologne , or German ,umber , a brown pigment obtained from lignite. See Cologne earth .
Raw Umber
Pigment Classification
: Natural Inorganic
Chemical Description: Natural Iron Oxide containing Manganese
Opacity/Transparency: 1
Lightfastness Rating: I
Permanency: Excellent
Colour Index Name: PBr 7
Colour Index Number: 77492
Munsell Notation Listing:
Hue: 3.0 Y
Value: 2.50
Chroma: 1.3
Pantone Matching System: 90%Pantone Black
Spectrometer Readings: N/A
Viscosity Range: 23000-27000 CPS
PH Range: 8.3-9.0
Gloss Average: 16.59
CIE L*a*b* Values: L*29.25 a*1.04 b*2.67
Tint Strength: 76.39

RawUmber Art & Design

Nick Beatty

Nicholas Beatty


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