Subject: Re: Green patina on Cu

From: [email-masked] (Steve Rayner)
Date: Fri, 16 Sep 1994 04:47:38 GMT

To colour Copper or Brass Green

Cupric nitrate       Cu(NO3)2                           40 grams
Ammonium chloride    NH4CL                              40 grams
Calcium chloride     CaCl2, 2H2O                        40 grams
Add distilled water to make 1 litre
Brush onto a clean surface.
This is from an old text book, I haven't tried this one, but others in the book
have worked well for me.

                            Steve Rayner
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