Ben,
Being very new to PCB etching, I wouldn't know where to begin to look for cupric chloride. Any hints? Do you handle it the same way as FeCl?
Also, what is the best way to dispose of etchant?
Thanks.
--- In Homebrew_PCBs@yahoogroups.com, "Ben L" <bhleavi@...> wrote:
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> --- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@> wrote:
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> > FeCl would normally be a light or dark tan color. Black or green means
> > it's spent. The cheapest thing to try is to add some hydrogen peroxide
> > to it, which will convert some or all of the dissolved copper into a
> > cupric chloride etchant (emerald green). If that doesn't work, you'll
> > have to add some hydrochloric acid, effectively making an acid/peroxide
> > etchant that happens to have some spent FeCl in it.
> >
> > I've used old etchant that wasn't spent and it works just fine; it's not
> > the age that counts it's how much you've used it.
> >
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> FeCl also works best Heated. I would really recommend the Cupric Cholride, it works great. I use to use FeCl but now that I use Cupric Cholride I'll never use FeCl again. Cupric Cholride also does great just at room temp. so no heating.
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> Ben
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