Homebrew PCBs

I'm sure, i've read the documents just a few days ago because i'm looking
into putting up a small prototyping PCB line at work.
Some german made PCB lines come with ion exchanger, the ones from Mega UK
don't, but they do sell the separate unit for treatment.

I don't say that it makes sense though.

ST

On Tue, Oct 7, 2008 at 11:53 AM, Adam Seychell <a_seychell@...>wrote:

>
> Traditionally, people precipitate the copper in large tanks and after
> the solids settle, it should be below about 5ppm and ready to dump. ion
> exchanges are only required when precipitation fails , for example,
> rinse waters containing chelators, which keep metal ions soluble.
>
> Are you sure the discharge limit in Europe is 0.5mg ?, That level is
> lower than what is considered safe to drink. Heck , some natural water
> supplies are higher than 0.5mg.
>


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