Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Ben L" <bhleavi@...> wrote:
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> > I found cupric chloride to be very slow at room temp, it benefits from heating even more than FeCl. HCl + peroxide certainly works fine at room temp though, until enough of it converts.
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> I have never heated mine before.  In fact I have it on the back porch and have etched boards fine in cold weather.  I just pump lots of air into it.  Sometimes add a little HCl if it seems to be slower than normal.  I kept it covered when not in use but can still vent.  So times will leave it uncovered to reduce it down some.  I normally don't add any peroxide.
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> Ben
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How long does it usually take? I found that mine took ~15 minutes to etch at room temp, while I'm used to etching in 3-4 minutes. Longer etching times cause more problems with pitting and etching under the resist. I had trouble making reliable 10 mil traces unless I heated it.