Homebrew PCBs

I have a good respirator, if I HAVE to ever do that again, I will do 
it outside - with the respirator, AND standing up-wind from the 
material as it is being sanded.

It sure is funny how certain things can set off the coughing like 
that.



--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> On Tue, 18 Apr 2006 02:03:30 +0200, Herbert E. Plett 
<cachureos@...>  
> wrote:
> 
> > It appears as though
> >
> >> the copper oxide (whatever the black stuff is) can be a 
repiratory
> >
> >> irritant of some sort.
> >
> > ...
> >
> >
> > the way to remove the oxide is with muriatic acid (HCl)...
> >
> 
> 
> Or sand under water if you must.
> 
> ST
>