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.
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Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-19 by Herbert E. Plett