Homebrew PCBs

On Fri, 30 Jul 2004 19:05:42 -0000, mikezcnc <eemikez@...> wrote:

> Steve,
>
> It is a nice addition to the discussion. I personally don't need to
> use IPA anymore. What I need to use is acetone to dissolve the melted
> toner. I noticed that it helps if I leave the toner soaked in acetone
> and then rub it off, otherwise it is very hard to remove it just by
> rubbing it with paper towel. I am afraid that acetone is here to stay
> for the removal of hardened toner because any stronger chemical like
> Xylene is even worse to be around. I wonder what does ultrasonic
> cleaner do the hardened toner?
>
> Mike
>

Mike, i have something you might like:
Use another board and scrape the toner off witht the edge.
I do it all the time and it works very well, no damage even to the 
thinnest trace.

I mentioned the ultrasonic cleaner a while ago, and asked for someone
having one to try and see if the toner is affected. My idea was to use
the micro-cavitation action to speed up the etching itself. For this
it should of course not attack the toner.
I'd REALLY like to hear of someone placing a board with toner in the 
ultrasonic
cleaner.

ST

(P.S. xylene/tulene laquer thinner works very well, without attaching the 
eopxy,
but it is very nasty indeed)