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Subject: Re: [Homebrew_PCBs] Re: Etching Problem

From: "Herbert E. Plett" <cachureos@...>
Date: 2010-03-19

are you sure it is 30%, and not 30 vol?
30% is very hard to get.
don't put any water in. to reuse add more H2O2, water enough...


--- On Thu, 3/18/10, Mark Lerman <mlerman@...> wrote:
> I'm using 30% H2O2, not 3%, but I
> have to do some calculations to
> compare the two.