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Subject: Re: [Homebrew_PCBs] HCl Etchant Question

From: Harvey White <madyn@...>
Date: 2010-03-22

On Mon, 22 Mar 2010 14:35:42 -0400, you wrote:

>As I understand it, the H2O2 is used to provide oxygen to the HCl,
>but using 3% peroxide slows it down because of dilution of the
>HCl. Has anyone tried just bubbling some oxygen through the HCl? Or
>is this just too dangerous to contemplate?? Thought I'd ask before
>trying. <smile>

Just bubble air. IIRC, it will convert to CUCL soon enough. That
will require air to work.

Harvey

>
>Mark
>
>