--- In
Homebrew_PCBs@yahoogroups.com, John Michaud <greyfox1143@...>
wrote:
>
> Thanks - I'm in the Portland OR area - and ya the manager of that
Radio Shack said check on Tuesday when they get there stock
shipments. But I had the impression they may not carry the product
anymore. Also I believe it was $6.99 for 16 oz
>
> Thanks for the links everyone -
>
> John
>
If your near Beaverton stop in at Falk hardware on Cedar hills and
pick up a gallon of Hydrochloric acid ~37% sold under the name
Muratic acid for $5. Then stop off at any drug store and buy a quart
of 3% Hydrogen Peroxide for about $1. Add 2 parts Hydrogen peroxide
to your etch tank first, then add 1 part Hydrocloric Acid last. You
will not need to heat it, it creates it own, just add an air bubbler.
This will etch your board in about 3 minutes. Its way CLEANER,
CHEAPER, and FASTER than the brown stuff from Radio shack.
Before everyone jumps all over me. Hydrochloric acid is used by brick
layers to clean brick work, and to clean concrete driveways, and its
also used adjust pH in swimming pools. Yes, you have to be carefull
because it is a STRONG acid. Wear eye and skin protection, and use in
well ventilated area, you should be doing that anyway with the Ferric
Chloride.
Once you give it a try, you'll never go back.
Ron