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Subject: Re: [Homebrew_PCBs] Re: Etch safe materials for etch tank

From: Adam Seychell <a_seychell@...>
Date: 2004-12-08

Phil wrote:
>
> about acrylic - the guys at TAP Plastics told me that it is not acid
> resistant. I wouldn't use it for CuCl because of that. It worked
> fine for AP and FeCl, though.
>
> Phil
>
The three above mentioned etchants normally have acid and pH will be
very low (< 1). Acrylic (PMMA) is ok for acid. I made a small
electrochemical test cell out of this stuff and have had 20% sulfuric
acid in it for weeks at a time and see zero effect to date.

Nylon is the common plastic you must avoid contact with acid for long
periods, even vinegar.

Of course there is always www.google.com