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

>From: Les Newell <lesnewell@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] CuCl wierdness
>Date: Fri, 17 Dec 2004 23:19:59 +0000
>
>
>Hi,
>
>I have been using CuCl etchant for a while now. Before etching I add a
>tablespoon of 100 volume H2O2 and away I go. Recently something has
>changed. When adding the H2O2 the soulution used to bubble slightly and
>change colour from muddy green to a nice blue-green. Recently when I add
>the H2O2 it bubbles violently and nothing else happens. Has anyone else
>had this problem?

Try adding some HCl.

Leon