Homebrew PCBs

On Fri, 16 Jun 2006 23:28:28 +0200, Robert Hedan  
<robert.hedan@videotron.ca> wrote:

> Any ideas for a source of charcoal?  Would ashes be good?  Or does it  
> have
> to be a special composition?


You need activated charcoal. Get it from ebay, military surplus, 30kg  
around 10eur already in metal filter frames.
Or you can get filters for kitchen fume hoods that recycle the air into  
the room. I would expect a number of other filters are available as  
charcoal version as well.

The purpose of the charcoal is to trap chemicals and stuff, it has a huge  
surface area. I'm not sure it is any good for etchant fumes though.

ST