Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:
>
> 
> Steve <steve65@...> writes:
> > How much of the fumes can humans tolerate? Are the fumes harmful?
> 
> Chlorine gas is toxic.  I don't know the LD50 but I don't want to find
> out the hard way either.  I've got a fume hood and vent, just a simple
> bathroom vent fan and some flexible aluminum foil ductwork.
> 
> Copper salts are toxic if ingested, so don't drink your etchant either ;-)
>

Thanks for the comments. 

Can I get some ideas on how to build this hood? Using a bathroom vent fan sounds like a good idea but aren't the fan blades made of metal? And wouldn’t that corrode in a short period of time with this chemical mixture?