Lars,
I bought a small bottle of Hydrofluoric acid from an electronics supply
store. I think it was called 'Armour Etch' or something like that. You
might also try a Chemical Supplies place. I bought the stuff for the same
reason you need it for! I was planning to cut the template from a thin
sheet of plastic (or photoetched brass) and carefully sponge the acid on
through it, then wash it off later. At the moment I have it listed as Priority
#20000 or so :)
Steve.
steven@phaedra.apana.org.au
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