Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

"nathan_h_tna" <nathan_h_tna@...> writes:

> What is the best way to dispose of these etchants?

Don't dispose of them! The acid/peroxide etchant becomes CuCl etchant
with use, which can be air regenerated and used over and over again.

The FeCl etchant can be rejeuvenated with a little Hydrochloric acid;
eventually it also becomes CuCl etchant.