Jump to content

Effect of patina on copper


Recommended Posts

How does a patina combination of copper sulphate and ammonium chloride solution react to copper 

I’ve a mokume gane ring of silver, rose gold and copper. To intensify the colour of copper I’ve been recommended to periodically wipe the ring with the above patina solution 

am keen to understand the impact of this on the copper over tome


Link to comment
Share on other sites

23 hours ago, chenbeier said:

Ammonium is slightly acidic and dissolves copperoxides from the ring. Ammonia is also complex agent for copper. Coppersulfate is catalyst. It should also work without copper sulfate, but slower.

Thanks for this. It makes sense. But how does CuSO4 catalyse this process?  

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.