On Tuesday, Jun 1, 2004, at 19:00 US/Pacific, Mike Hord wrote:

>> I've heard of a CuCl method that can be made from hardware and drug
>> store items.

CuCl etching is documented here:

     http://users.rcn.com/rexa/Projects/CuCl_ech.html

You can cheat and make your own initial CuCl by disolving copper scrap
in an aereated mixture of Hydrochloric acid (hardware store item) and
hydrogen peroxide (drug store item.)   Been there, done that, it was
fun, and it seems to work ok as etchant... It seems to make copper
oxychloride too, which implies that you might be able to start with
copper oxychloride (which is pretty commonly available from
pyrotechnics chemical dealers, and not hazmat...)

Etchants requiring aereation are a bit of a pain; the atomized bits
float all over the room, causing all sorts of corrosion in things that
aren't supposed to corrode (stainless steel sinks, for instance.)

BillW

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