English definition of Copperas

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Definition of copperas

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Copperas (n.) Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate..

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Atramentarious :: Atramentarious (a.) Like ink; suitable for making ink. Sulphate of iron (copperas, green vitriol) is called atramentarious, as being used in making ink..

Misy :: Misy (n.) An impure yellow sulphate of iron; yellow copperas or copiapite.

Mordant :: Mordant (n.) Any substance, as alum or copperas, which, having a twofold attraction for organic fibers and coloring matter, serves as a bond of union, and thus gives fixity to, or bites in, the dyes..

Copperas :: Copperas (n.) Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate..

Coquimbite :: Coquimbite (n.) A mineral consisting principally of sulphate of iron; white copperas; -- so called because found in the province of Coquimbo, Chili..