What is a composition of quicksilver, tin, and sulphur, forming a yellow powder, sometimes used by mediæval artists, for the sake of economy, instead of gold. Fairholt called?

porporino — A composition of quicksilver, tin, and sulphur, forming a yellow powder, sometimes used by mediæval artists, for the sake of economy, instead of gold. Fairholt. (Webster's 1913.)

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