A great patina for copper. One of my students taught me to put a paper
towel in a sealable plastic container, put in the copper pieces, and
pour ammonia over the pieces and soak the paper towel. Then sprinkle
the pieces with salt, table salt. I then cover the pieces with another
paper towel soaked in the ammonia and then I sprinkle some more salt
on this paper towel. Close it up for a day or two and you will get a
very pretty blue/green patina that seems to be “tight” on the metal. I
have even bent the pieces with out the patina cracking or peeling off
as some do.
Ratios are just soak the towels, do not have the copper covered by
the ammonia. Sprinkle the salt on both the copper and the paper
towels, like I do on my favorite “fried potatoes”, a lot!
I have put this patina even on twisted 18 guage copper wire that I
then bend in to small copper sculptures. Then I spray them with clear
enamel to make it even more permenent.
I will try to put together an “Online Class” on my web site, this
week and have under “Tips and Tricks” by the end of the month.
PO Box 2433 Estes Park, CO 80517