Homebrew PCBs

--- On Sun, 25/4/10, Stefan Trethan <stefan_trethan@...> wrote:
> From: Stefan Trethan <stefan_trethan@...>
> Subject: [Homebrew_PCBs] CuCl Tank and silicone
> To: Homebrew_PCBs@yahoogroups.com
> Date: Sunday, 25 April, 2010, 7:46 PM

> Slowly but surely I get the
> impression silicone is just not suitable
> to make CuCl tanks with.

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