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Subject: Re: [Homebrew_PCBs] How to dispose of etchant?

From: DJ Delorie <dj@...>
Date: 2010-01-05

"Leon Heller" <leon355@...> writes:
> > The FeCl etchant can be rejeuvenated with a little Hydrochloric acid;
> > eventually it also becomes CuCl etchant.
>
> + H2O2, otherwise it will be cuprous chloride which doesn't etch.

What happens if you dump spent FeCl etchant into a CuCl ethant bath?