On Mon, 17 Apr 2006 16:20:56 +0200, lcdpublishing
<
lcdpublishing@...> wrote:
> Hi Guys,
>
>
> This is the first time i have run across something like this. I was
>
> doing some experimenting with the ink over the weekend for etching.
>
> Anyway, I dipped a board in Ferric Chloride for about 10 seconds or
>
> so to give it a dull surface. I rinsed it off, not super good, but
>
> rinsed it and left it to dry in my soldering jig.
>
>
> It turned all black. So, I just took some scotch brite and started
>
> to polish it and began coughing right away. It appears as though
>
> the copper oxide (whatever the black stuff is) can be a repiratory
>
> irritant of some sort.
>
>
> Generally stuff doesn't bother me - I smoked for for 35 years or so
>
> and work around dust all the time in the woodshop. Very little has
>
> ever got me coughing that much that quickly. So, I just thought I
>
> should mention this in case someone else runs into something similar.
>
>
> Chris
hmm strange..
usually when your body tells you something it is clever to listen ;-)
ST