
thumb|upright=1.2| , a wash painting using bistre pigment by Jean-Honoré Fragonard (1732–1806)
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thumb|upright=1.2| , a wash painting using bistre pigment by Jean-Honoré Fragonard (1732–1806)
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. Bistre's appearance is generally of a dark grayish brown, with a yellowish cast.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).