Letter 7089

Etchants for Cu-Ag alloys 

+

I am studying the Cu-Ag alloys because in Peru there are historical jewellery made of this alloys. I want to know, what etchants can i use in my study?

Beatriz Sanchez Gamarra
- Peru

The simplest etchant for copper and silver alloys is a mixture of ammonium hydroxide (NH4OH) and hydrogen peroxide (H2O2). Mix at about 1:1 ratio if you are using 3% peroxide. Mix at about 1:1:1 with water if you are using 30% peroxide.

Good luck.

Larry Hanke materials testing laboratory Minneapolis, Minnesota

I want to post a question or inquiry of my own.

 

I want to answer or follow-up on this question publicly (in non-commercial fashion).

 

I am a supporting advertiser and want to reach the inquirer privately.