--- In
Homebrew_PCBs@yahoogroups.com, David Griffith <dgriffi@...> wrote:
>
> On Mon, 1 Feb 2010, Chris wrote:
>
> > I have been using the same bottle for about 2 years now (give or take a
> > bit). I pour it into an old film developing tray, toss my PCB into it
> > for a couple of minutes, then return the stuff to its original bottle.
> > It certainly has NOT degraded the product's ability to tin a circuit
> > board. As for rinsing, I put it in the sink, and run water on it for
> > about 10 to 20 seconds - cold or warm water, whatever comes out of the
> > faucet.
> >
> > Yes, the stuff stinks a tiny bit like rotten eggs. Not knowing what
> > this chemical actually is, I usually do it outdoors to be safe.
>
> That might be the thiourea giving off hydrogen sulfide. If you think you
> can tough out that smell, you're intoxicated with it.
Yes, Hydrogen Sulfide will dull the sense of smell, possibly allowing the
person breathing it to receive a fatal dose. Use caution!
I used to have a really nice Tin plating recipe. It used Sodium Chloride,
Stannous Chloride, and Sodium Cyanide. Yes, I'm being serious, and
no, I don't use it any more.
> --
> David Griffith
> dgriffi@...
Dave