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It is made by heating raw sienna, which dehydrates the iron oxide, changing it partially to haematite, giving it rich reddish brown colour.
Some five yards behind is a long row of motor pumps and oil containers painted scarlet, green, sienna, saffron, etc.
Sienna then goes away for a few days to give him space.
From volume 25 (1964) onwards, all volumes have been published in a uniform burnt sienna hardback binding.
An imprimatura is usually made with an earth color, such as raw sienna, and is often diluted with turpentine.
All of the bridges and sound barrier walls were painted sienna beige as part of a color theme to the freeway.
When heated, it becomes a reddish brown and is called burnt sienna.
Many earth tones originate from clay earth pigments, such as umber, ochre, and sienna.