GREEN FILM ON COPPER Crossword Clue
GREEN FILM ON COPPER Crossword Clue
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Crossword Puzzle Infos
The term GREEN FILM ON COPPER can be summarized as PATINA, which is a thin layer of oxidation that forms on the surface of copper and other metals. PATINA is usually green in color and is caused by exposure to air and moisture. It is often seen as a desirable effect on metal surfaces, as it gives them a unique and aged look.