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

I've used up my Ammonium Perchlorate so I got HCl and H2O2. I
understand that I need to use a bubbler to regenerate the etchant and
have seen references to letting it run a long time. How long should I
expect - hours? days?

Currently, my bubbler is a piece of vinyl tubing that I drilled #70
holes in, This produces somewhat large bubbles. I'll try it but do
those of you that use CuCl recommend something different, like an
aquarium airstone?

I'll be using about 3 Liters and doing a number of double sided boards
in the 10x15 CM size range, 1 oz copper. I have an aquarium heater
that will bring the temp up to about 100F (about 38C) if that matters.

Thanks
Phil