Bistre

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Bistre (or bister) is a pigment made from soot. Historically, beechwood was burned to produce the soot, which was boiled and diluted with water. Many Old Masters used bistre as the ink for their wash paintings.^[1] Bistre's appearance is generally of a dark grayish brown, with a yellowish cast.

Bistre has also been used to name colors resembling the pigment, typically shades of brown. The first recorded use of bistre as a color name in English was in 1727; another name for the color bistre is soot brown.^[1]