Homebrew PCBs

On Wed, 07 Sep 2005 19:58:18 +0200, Phil <phil1960us@...> wrote:

>
> nasty stuff.  wear old clothes.  mix in a large vessel as splashing
> and sizzling can get pretty intense if you over do it.  at this point
> I suspect AP will sound pretty good   There is a non-anhydrous form
> of FeCl that people have mentioned that doesn't sizzle/splash/heat but
> I've never seen it.


I mixed it in a PET bottle (filled with cold water and added FeCl with a  
funnel) and the heating wasn't bad. Splashing was not a problem in the  
bottle. You can do it near a sink then you could put the bottle in a cold  
water bath should it get too hot. The thing to remember is start out with  
what the label suggests on water, no less. If you think you'll add some  
water later you'll potentially have too much ferric chloride and not  
enough water, and it could overheat.


As for eye protection, i found i much prefer a face shield over goggles.  
Not so much of a difference with chemicals, as i never had an accident,  
but when sawing etc. somehow the chips always find their way round the  
goggles into my eyes. (Even have burnmarks on the EYE-SIDE of optical  
glasses over which i wore ALLROUND CLOSED safety goggles when using the  
angle grinder)
Dunno but those goggles do not seem to fit my face ;-)... hmmm maybe i  
ought to try a diving mask!

Anyway, the face shield is much better protection and visibility, and it  
was expensive so i make damn sure i avoid scratching it... wish they were  
more popular here so i could get them replacement plastic sheets in the  
shops.

ST