Homebrew PCBs

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



--- In Homebrew_PCBs@yahoogroups.com, steve gunsel <gunsel@v...> 
wrote:
> 
> >Date: Fri, 30 Jul 2004 13:57:41 -0400
> >To: Homebrew_PCBs@yahoogroups.com
> >From: steve gunsel <gunsel@v...>
> >Subject: IPA and acetone
> >
> >ST,
> >
> >Volatility (speed of evaporation) has a lot to do with it. 
Volatility and 
> >solvency are not the same. Acetone, however, is a potent solvent 
for many 
> >substances and also happens to be highly volatile. If you dissolve 
> >"anything" in the acetone, and allow the acetone to evaporate, the 
> >"anything" will be left behind.  And acetone evaporates very 
quickly - it 
> >starts evaporating as soon as it is applied.   Nothing on a board 
is 
> >likely to evaporate faster or it would not be there in the first 
> >place.  IPA evaporates more slowly so you have a better chance of 
removing 
> >the IPA with the dissolved residue.
> >
> >Help any?
> >
> >Steve Gunsel
> >Medina, OH
> >
> >>As for the "IPA leaves residue",
> >>it sounds right, but strangely i get holes in the transfer with 
acetone
> >>while it is perfect with IPA.
> >>I must try again with 100% same procedure.
> >>
> >>ST
> 
> 
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