Sienna Ochre

Sienna

Sienna is an earth pigment containing iron oxide and manganese oxide. In its natural state, it is yellowish brown, and it is called raw sienna. When heated, it becomes a reddish brown, and it is called burnt sienna. It takes its name from the city-state of Siena, where it was produced during the Renaissance. Along with ochre and umber, it was one of the first pigments to be used by humans, and is found in many cave paintings. Since the Renaissance, it has been one of the brown pigments most widely used by artists.

Ochre

Ochre is a family of natural clay earth pigments, made up of ferric oxide and varying amounts of clay and sand, ranging in colour from yellow to deep orange or brown. The term is also used for the colours produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as red ochre. The term "ochre" is colloquially used to cover a range of different substances used for their colours in Aboriginal Australian art and ceremonial decoration, for instance the clay known as "white ochre" or "pipe clay" is derived from kaolin or gypsum.

sienna

Noun

1. A form of clay containing iron and manganese.
2. A pigment with a reddish-brown colour.

Adjective

1. having a reddish-brown colour.

ochre

Noun

1. A clay earth pigment containing silica, aluminum and ferric oxide.
2. A somewhat dark yellowish orange colour.

Adjective

1. Having a yellow-orange colour.
2. Referring to cultures that covered their dead with ochre.