Homebrew PCBs

On Sat, 31 Dec 2005 23:15:16 +0100, kennytrussell  
<kenneth.trussell@...> wrote:

>
>
> NOTE: Toluol causes all kinds of cancer, etc., according to the
>
> label. Be careful! It is wonderful for washing the toner off the
>
> boards, however. A little in a tin pan is all that is needed. I use
>
> a paper towel held in tweezers to wash the board. What do you other
>
> guys do to remove the toner either for a redo or just after etching?


Acetone is a safe replacement.
You don't need to submerge it, drip some acetone on the pcb, and wipe the  
board with a paper towel.

By the way i do not use any solvent, i just use a steel scraper or even  
the edge of another PCB. Don't worry about the traces beeing scraped away,  
doesn't happen. If you have left behind some small pieces or it smeared  
slightly in the etched areas (happens if you use another PCB because it  
isn't a nice hard edge) you can clean up with much less acetone and much  
less effort. Scraping works on both dry and wet boards, doing it wet binds  
the scrapings and you can flush them away, otherwise work over the trash  
bin.

ST