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verdigris |
Also found in: Wikipedia, Hutchinson | 0.04 sec. |
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verdigris (vûr`dəgrēs'), one of three copper acetates: blue verdigris, Cu(CH3COO)2·CuO·6H2O; green verdigris, 2Cu(CH3COO)2·CuO·6H2O; or neutral verdigris, Cu(CH3COO)2·H2O; or a mixture of them. It is a poisonous gray-green to green-blue substance that is formed by the action of acetic acid on copper or copper oxide, e.g., verdigris can form on copper pots used to cook acidic foods such as tomatoes. Verdigris is used as a mordant in dyeing, as a pigment, and in making Paris green Paris green, also called Schweinfurt green, an extremely poisonous, bright green powder that was formerly used extensively as a pigment (e.g., in wallpaper) and that is sometimes used as an insecticide or to kill plant fungi; it must be used with great caution ..... Click the link for more information. . Verdigris may also be used to mean patina patina (păt`ənə), coating of carbonate of copper on articles of copper or bronze, formed after long exposure to a moist ..... Click the link for more information. . |
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Verdi green
