I usually use a commercial product that is basically a mix of copper sulfate and ammonia chloride for coloring copper green and/or blue. ("Modern Options" is one brand that I find at most craft stores in my area of the U.S.) I am not sure how it works on other alloys.
Given enough time, in an enclosed space, ammonia will blue copper and peroxide will green copper.
I have actually found a lot of recipes for coloring metals in old books like "Scientific Facts and Formula" published around 1900 - 1920.
There is a good contemporary book out on statuary patination (hot and cold) but I cannot remember the name of it. I used to have a copy but loaned it out and it has never returned. I think it cost almost $50.00 U.S.
Scrollerbear
coloring metal
I usually use a commercial product that is basically a mix of copper sulfate and ammonia chloride for coloring copper green and/or blue. ("Modern Options" is one brand that I find at most craft stores in my area of the U.S.) I am not sure how it works on other alloys.
Given enough time, in an enclosed space, ammonia will blue copper and peroxide will green copper.
I have actually found a lot of recipes for coloring metals in old books like "Scientific Facts and Formula" published around 1900 - 1920.
There is a good contemporary book out on statuary patination (hot and cold) but I cannot remember the name of it. I used to have a copy but loaned it out and it has never returned. I think it cost almost $50.00 U.S.
Scrollerbear