Letter 1120

Keeping copper from turning green

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Hello,

I have a cupola with a bright new shiny copper top. I have polished it with Brasso [link is to product info at Amazon]. Can you tell me if there is anything I can apply to the copper to keep it nice and shiny as opposed to turning green?

Thanks so much!!!!

Joanne S

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Please provide your full name on any followups Joanne.

A lacquer (clear) will prevent the copper from oxidizing and changing color. You might talk to G.J. Nikolas.


Ted Mooney, P.E. 
finishing.com
Brick, New Jersey

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I am interested in finding a quick way to oxidize copper to speed the natural process by which copper turns green over prolonged periods...any suggestions?

Erik Andersen

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For Erik

Get swimming pool chlorine (stronger than store bleach) and soak the copper for a day or so. Will turn green.

Evan Sax
Newland, NC

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For complete info about how to turn copper-bearing metals any conceivable shade, see this great book on patinizing.

 
Ted Mooney
finishing.com - Brick, NJ

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