BIS'TER, n. Among painters, the burnt oil extracted from the soot of wood; a brown pigment. To prepare it, soot [that os beach is the best' is put into water, in the proportion of two pounds to a gallon, and boiled half an hour; after standing to settle, and while hot, the clearer part of the fluid must be poured off from the sediment, and evaporated to dryness; the remainder is bister.
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