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How to blacken nickel-silver?

Joined
Jun 13, 2006
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1,008
I'm looking for how to make it. Found a lot recipes, but not about nickel-silver alloy.
Need to make it at least dark-grey. Any ideas?
 
why do you want to make the patina solution? nickel silver is just a white brass,so any brass oxidizer will work. or any gun bluing solution containing selenium.
 
Nickel silver [german silver] is an alloy of copper, zinc, nickel .It does NOT contain silver. Those elements all form sulphides which are black. I haven't ever tried selenium solutions but selenium is very similar to sulphur .
 
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