On 20/06/16 23:19, Les Newell les.newell@... [Homebrew_PCBs] wrote: > > 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. It makes excellent weed killer.
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Re: [Homebrew_PCBs] Etching with vinegar, peroxide and salt
2016-06-20 by Russell Shaw