-----Original Message-----
Mark
>From: Ben L <bhleavi@...>How long does a board take to etch with this system?
>Sent: May 17, 2010 11:55 PM
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] Re: Old GL FeCl -very slow etching copper
>
>
>
>> 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.
>>
>
>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.
>
>Ben
>
Mark
>
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