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Archivo:Pigment umber raw iconofile.jpg

Raw umber

Umber is a natural brown clay pigment which contains iron and manganese oxides. The color becomes more intense when calcined (heated), and the resulting pigment is called burnt umber. The name derives from Umbria,[citation needed] a mountainous region of central Italy, but it is found in many parts of the world. Some of the finest umber comes from Cyprus. It has been used as a pigment since prehistoric times.

Chemical formula: Fe2{{chem/suError en la expresión: no se reconoce la palabra «o».m2|3|O}} + MnO2 + nH2{{chem/suError en la expresión: no se reconoce la palabra «o».m1|O}} + Si + Al2{{chem/suError en la expresión: no se reconoce la palabra «o».m2|3|O}}

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de:Umbra (Farbe) nl:Umber ja:アンバー (顔料) ru:Умбра (пигмент) sk:Umbra fi:Umbra sv:Umbra (färg)

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