jewelers' rouge

jewelers' rouge
colcothar.

* * *


Universalium. 2010.

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  • colcothar — /kol keuh theuhr/, n. Chem. the brownish red oxide of iron produced by heating ferrous sulfate: used chiefly as a pigment in paints and theatrical rouge, and as a polishing agent. Also called jewelers rouge. [1595 1605; < ML < OSp colcotar, SpAr… …   Universalium

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  • col|co|thar — «KOL kuh thuhr», noun. a brownish red oxide of iron which remains after heating ferrous sulfate, used as a polishing agent and as coloring matter; jewelers rouge. ╂[< Medieval Latin colcotar < Arabic qolqotār copperas, perhaps < Greek… …   Useful english dictionary

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