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

----- Original Message -----
From: "DJ Delorie" <dj@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, January 05, 2010 5:33 AM
Subject: Re: [Homebrew_PCBs] How to dispose of etchant?


>
> "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.

+ H2O2, otherwise it will be cuprous chloride which doesn't etch.

Leon