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copperas
[ kop-er-uhs ]
copperas
/ ˈkɒpərəs /
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Word History and Origins
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Word History and Origins
Origin of copperas1
C14: coperose, via Old French from Medieval Latin cuperosa, perhaps originally in the phrase aqua cuprosa copper water
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Example Sentences
Logwood dyes lilac, or pink; to turn red hackles brown, boil them in copperas.
From Project Gutenberg
Copper dissolved in the vitriolic acid forms crystals of a blot colour, called blue copperas.
From Project Gutenberg
Boil the logwood for 30 minutes in a gallon of water, and then add the copperas and lampblack.
From Project Gutenberg
The hypo., when thus affected with the copperas, appears also to throw a mist over the picture, which new hypo.
From Project Gutenberg
When such is the case, only about 1⁄6 or 1⁄7th of their weight of copperas should be employed.
From Project Gutenberg
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