Homebrew PCBs

Since it has happened several times now, and this one was glued really
well, I must assume it is incompatible.

What is interesting is that it is a very slow effect. Maybe the
british knew what they were doing when they used CuCl in timing
pencils ;-)

ST

On Sun, Apr 25, 2010 at 8:52 PM, anachrocomputer
<anachrocomputer@...> wrote:
>

>
> At last week's Dorkbot Bristol, we had a talk on making PCBs
> (by UV exposure method) and the speaker mentioned this. He'd
> used silicone sealer on an etching tank, and found that it had
> leaked. The etchant had a warning on the label about not using
> silicone sealer in contact with the liquid. But no-one knew
> why this should be, chemically speaking.
>
> --
> John Honniball
>
>