Hi guys.
I just dumped the contents of my 2-litre concertina bottle of FeCl3 into
my etching tank, and about half way through I was treated to a loud
HISSSSS as this lot got dumped in the funnel:
http://groups.yahoo.com/group/Homebrew_PCBs/photos/album/338698001/pic/1053817307/viewBasically, it's a dark brown precipitate that's formed into round loops,
not unlike dead leaves in autumn. I now have the unenviable job of
dismantling the tank and cleaning out the base and the air bubbler. One
of these days I'll rig up a proper circulation pump and filter system
(not unlike those on photo-lab machines if you've ever seen inside one
of those)...
But anyway, back to the subject of my question. Does anyone know what
this stuff is? My FeCl3 is a somewhat greenish brown at this point, but
I've got a 5-litre bottle of "hyper-activated" FeCl3 in the garage.
Would there be any benefit to adding a bit more concentrate to the
working tank?
And the final question: how the hell do I get rid of this stuff? Flush
it down the loo? Double-bag it and chuck it in the bin? Call a local
haz-chem company who won't touch it until I've got some arbitrary number
of litres of the stuff and am willing to pay several hundred quid in
disposal fees?
Thanks,
--
Phil.
ygroups@...http://www.philpem.me.uk/