An earth colour is a pigment derived from the earth, as opposed to chemically manufactured pigments. Earth colours include ochre, sienna, umber, red oxide and malachite with further colours developed by calcining the materials to form for example burnt sienna. Earth colours are very stable and permanent. Research Earth Colour
Raw sienna is a yellow-brown earth colour consisting chiefly of iron oxide and containing smaller amounts of silica, alumina, manganese oxide and calcium carbonate. Raw sienna is found mainly in Italy and Sicily, and gets its name from the Italian town of Sienna. Raw sienna is a somehat transparent, golden yellow pigment. Research Raw Sienna
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Matt and Leela Probert
Abbreviations
Research Earth Colour
