--- In
Homebrew_PCBs@yahoogroups.com, mlerman@... wrote:
>
>
>
>
> -----Original Message-----
> >From: Ben L <bhleavi@...>
> >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
> >
>
> How long does a board take to etch with this system?
>
> Mark
I have never really timed it to say for sure. Depends on how regentated it is and if I did a copper pour that reduces the area that needs to etch. I would say 5 to no more than 10 mins.
Seems to be about the same that I got with Heated FeCl then times change with it depending on how much had been etched in it also.
Ben