On 10/03/2013 13:02, Dave Sage wrote: > Perhaps someone with some knowledge on public works and sewage treatment can > clarify this for me. > > I guess it must be the copper in the ferric chloride etchant that we dispose > of that is the problem - is that correct? Is there actually copper per se > any more after the reaction of etching? Yes, copper kills the bugs that digest the sewage. Ferric chloride is actually used in water treatment. Leon -- Leon Heller G1HSM
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Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Leon Heller