Burnt sienna contains a large proportion of anhydrous iron oxide.It is made by heating raw sienna, which dehydrates the iron oxide, changing itpartially to haematite, giving it rich reddish-brown colour. The pigment is also known as red earth, red ochre, and terra rossa. On the Colour Index International, the pigment is known as PR-102. This version is from the Italian Ferrario 1919 colour list. The first recorded use of burnt sienna as a colour name in English was in 1853. This variation of burnt sienna is from the Maerz and Paul "A Dictionary of Color" from 1930. It is considerably lighter than most other versions of burnt sienna. It was a mix of burnt orange and raw sienna.
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