Homebrew PCBs

JanRwl@... wrote:
> In a message dated 10/6/2008 7:47:55 P.M. Central Daylight Time,  
> steve@... writes:
> 
> I've  been stockpiling my waste etchant for too long, some time soon I
> need to  get rid of it safely...<<
> Flush it down the loo, and don't TELL anyone!  If any  fears or feelings of 
> tree-huggingness, do so only a liter per evening, or  whatever!

FeCl is used as a floculent in sewage treatment. CuSO4 is in toilet sewage
pipe un-blocker tablets (root-rot). Used etchant is a very good weedkiller
and root killer for blocked pipes.

Because i'm using a bubble etcher, i just top up the etchant with HCl and
am using the same etchant for 2 years. It never gets 'spent'.