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

Mike I'm using a 50/50 mix of Pool acid and Hydrogen peroxide. I think it is muriatic Acid. I put a clean board in for maybe 15 seconds, just long enough to turn a brownish copper color, then I take it out run it under cold water and dry it. Sense I have a pool I just pour the old acid into the pool, the copper in the acid helps to keep the algae down.