Jinx wrote:
>
> > I've been looking at some of the various etchants (as I'm
> > going to be making some PC boards), but am confused.
> > From what I've read, Ferric Chloride is truly nasty stuff,
> > and I'd be likely unable to dispose of it. It does, of course,
> > have the advantage of being available at the Radio Shack
> > a stone's throw from my house.
>
> Wouldn't worry about it, FeCl is perfectly harmless. Disposal
> is something that you'll only need to consider occassionally
> on a very long term basis. It takes a lot of etching and a long
> time (years if you're doing this on a hobby scale) to use up
> even 500ml. Just keep using that bottle over and over. More
> important is that you do it somewhere or on something that
> you don't mind getting the odd brown mark on. Which includes
> you - smock, overalls or old clothes. No Armani

And don't spray concentrated solution in both your
eyes! It hurts. Stuck my head under the tap for
about 10 minutes afterwards to flush it out. I was a
first year apprentice and was cleaning brake tubing
in the FeCl tank, then I thought it would be smart
to blow the tubing out with the air gun...
Never again. :o)
-Roman

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