Rublev Colours Pigment Blue Ridge Burnt Sienna - 4 oz

Sienna pigments are iron oxide earth pigments that resemble yellow ocher that is then calcined in a furnace, resulting in a reddish-brown colour known as burnt Sienna. Unlike ochres, which generally are opaque, siennas are more translucent and warmer. When sienna earth is calcined (roasted) at high temperatures, it loses its water content (hydration) and becomes burnt.

Iron oxide earth pigments, often called, are an essential group of inorganic pigments derived from minerals. Iron oxide pigments are yellow, red, and brown, but artists know them as ocher, sienna, red oxide, and umber. Unlike manufactured pigments, the colour of iron oxide earth pigments varies with the composition of the particular segment of earth from which they come. The colour of sienna earth pigments is derived from three constituents: the principal colouring ingredient, a secondary colouring ingredient, and a base. The combination of these ingredients produces the particular colour of the earth. The innumerable forms and variations these ingredients can combine result in a wide range of yellows, reds, and browns.

Warning: Burnt Sienna is considered non-toxic, but care should always be exercised when handling the dry powder pigment to avoid inhaling the dust.