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

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