Gamblin 1980 Oils - PBr7-Raw Sienna (Natural iron oxide hydrated)

Raw Sienna: Traditional earth yellow glazing colour, initially mined in Tuscany. Consider using Gamblin Transparent Earth Yellow for more transparency.

Pigmentandnbsp;Composition and Permanence:andnbsp;

Pigment Name: PBr7-Raw Sienna (Natural iron oxide hydrated)

Pigment Type: earth

Properties

Raw Sienna is a moderately dull deep earth yellow with medium tinting strength and excellent transparency. It is one of the basic permanent artists' pigments and is made from a form of limonite clay whose yellow-brown colour results from ferric oxides.

Raw Sienna is preferable to Yellow Ochre for creating flesh tones due to its higher subtlety of colour when mixed with white. It creates a bright Ochre when mixed with Cadmium Yellow and creates greens and grays when mixed with Ultramarine. Raw Sienna dries quickly.

Permanence

Raw Sienna has good permanence.

Toxicity

Raw Sienna has no significant hazards.

History

Raw Sienna has been a pigment since prehistoric times, although its current name originated during the Renaissance.

It comes from the city of Siena in Italy and is short for terra di Siena, meaning the earth of Siena. Sienna was famous for mining and producing earth pigments from the Renaissance until World War II.

Due to the depletion of clay deposits in Tuscany, Italian siennas now come from other areas, including Sicily and Sardinia.