copperas
/kop-er-uhs/US // ˈkɒp ər əs //UK // (ˈkɒpərəs) //
铜矿,铜钱,铜矿石,铜矿区
Definitions
n.名词 noun
- 1
Chemistry.
- : ferrous sulfate.
Examples
Logwood dyes lilac, or pink; to turn red hackles brown, boil them in copperas.
Copper dissolved in the vitriolic acid forms crystals of a blot colour, called blue copperas.
Boil the logwood for 30 minutes in a gallon of water, and then add the copperas and lampblack.
The hypo., when thus affected with the copperas, appears also to throw a mist over the picture, which new hypo.
When such is the case, only about 1⁄6 or 1⁄7th of their weight of copperas should be employed.
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