Practical Magazine 20, 1876
(Chemistry applied to the Arts, Manufactures, &c.
Metallurgy.)
According to the "Industrie Blättern," a green varnish for metal articles may be thus prepared: — Put as much red arsenic or mastic into a strong potash lye as will be dissolved by it, then dilute the solution with water, and add a salt of copper (vitriol, or acetate of copper). The green precipitate should be washed, dried, and dissolved in oil of turpentine. Unfortunately, mastic is too dear for the varnish to be used for all purposes.
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