[sdiy] disposing of used etchant, was:PCB houses

[Ingo Debus]

Am 23.01.2009 um 22:34 schrieb Adam Schabtach:

> used ferric chloride can be neutralized
> with sodium carbonate, which is sold in grocery stores in the US as  
> "washing
> soda". This makes its disposal somewhat simpler and somewhat less
> environmentally offensive.

I'm not a chemist, but as far as I know the problem with used etchant  
is not that it is not neutral. It's the copper (ions) that are bad  
for the environment.

Ingo