Cassel earth, dark
Consists mainly of humic acids and iron oxide. Degradation processes: it fades on exposure to strong light and develops a cold, grey tone.
Color: dark brown
Colour Index: NBr 8
Suitability: Acrylics, Tempera, Watercolor / Gouache, Violin Varnish /Wooden Surfaces
Lightfastness: Concentrated: 8, Medium: 7, Thinned: 7 (1 is poor, 8 is best).
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