DJ,
Thanks. What are your typical etching times and temperature for, say, 1oz
copper?
Best
,
Todd
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K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
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QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design
On Thu, May 9, 2013 at 12:12 PM, DJ Delorie <dj@...> wrote:
> ∗∗
>
>
>
> "Todd F. Carney / K7TFC" <k7tfc@...> writes:
> > Responsible disposal is, of course, an issue.
>
> The "waste" your trying to dispose of, is itself an etchant. Save it,
> eventually you'll have a Cupric chloride etchant that doesn't need to be
> disposed of at all.
>
> I made my etchant by mixing HCl and H2O2 in a big container, then
> throwing in about half a pound of scrap copper and an air hose. The
> "waste" is a nice emerald green CuCl etchant that I've been using ever
> since.
>
>
>
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