Homebrew PCBs

--- 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