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

OK, I made up some of this stuff...2/3 peroxide and 1/3 acid, and it
worked fine the first time. Nice light green color when done, so I set
it aside in a sealed container for next time. 2 days later, I went to
etch again, and the stuff is dead. Peroxide doesn't reactivate it, and
the color is still light green. What am I missing?

thanks, Jim