Christine, I bought copper and silver bimetal from Reactive Metal
Studios to use in etching and would definitely recommend you contact
I don’t know if etching is your intended use, but if it is, a word
of caution. The silver appears to be far thicker than the copper in
the bimetal combination. When I used ferric chloride to etch away
the copper everywhere that my design on PnP paper did not protect it,
the result was just beautiful – a clean-edged copper spiral on a
silver background. However, when I tried to use ferric nitrate to
etch through the silver to the copper (I wanted a silver design on a
copper background that time) it didn’t work. Actually, I got a nice
etching on the silver, but as the silver was far thicker than the
copper, it never etched all the way through to the copper.
Furthermore, the ferric nitrate began to eat away at the underside of
the piece and the copper back began to look pretty ragged until
cleaned up with sandpaper. It didn’t spoil the piece, though.