--- In
Homebrew_PCBs@yahoogroups.com, Mark Lerman <mlerman@...> wrote:
>
> I don't make a lot of boards, and most of them are quite small, so
> I've been looking for a simple, fast way to etch. After experimenting
> with a few suggested recipes, I use a 1:1 ratio of muriatic acid
> (31.45%) to 12% hydrogen peroxide. The muriatic acid is available in
> any hardware store, the peroxide is easily obtained from a beauty
> supply store as "40 volume developer" - get the clear, not the creme.
> They are both very inexpensive, and the etching takes 1-2 minutes
> with a little hand agitation, no bubbling, no heat. DO THIS OUTDOORS
> or with a chemical hood. Then use NaOH to neutralize.
>
> For an etching container I use a polypropylene storage bin - they
> sell them is many sizes and they are very inexpensive.
>
> Mark
>
This is what I used to start with, it was very fast, the nice thing is it converts to cupric chloride after you use it enough and that stuff you can keep using over and over.