On Sun, 19 Jun 2016 19:46:48 +0000, you 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...
The CuCl etchant never really gets spent, you just occasionally add
more HCl and bubble air through it to etch.
However, you could neutralize the acid (carefully) with baking soda,
then all you have left are copper salts.
Harvey
>
>Charlie
>
>On 19 Jun 2016 09:01:49 -0700 "duwaynes@... [Homebrew_PCBs]"
><Homebrew_PCBs@yahoogroups.com> writes:
>
>One explanation I was given is that the vinegar reacts with the chloride
>in salt and produces a very weak hydrochloric acid. I tried it but it
>took forever to see any effect on the copper. Much easier to go and get
>a gallon of muriatic acid for $10. I only use about an ounce at a time
>along with 3 oz of peroxide and get boards etched in about 5 minutes.