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Subject: Re: [Homebrew_PCBs] Etching with vinegar

From: Les Newell <les.newell@...>
Date: 2016-06-20

Don't get it anywhere near a septic tank. Copper is really good at killing bacteria. Mixing it with cement or dry-mix concrete will neutralize the acid and tie the copper up in a solid block which can be disposed of in the bin. If you keep cement in a well sealed container it will last a long time so one bag will last you for ages.

Les

On 19/06/2016 20:46, n0tt1@... [Homebrew_PCBs] wrote:

I'd like to do that as well with the Muratic...question is what
does one DO with the spent etch?  Might not be so good
in a septic tank IF that is permitted to pour the stuff down
the drain.  Just asking...
 
Charlie