Homebrew PCBs

Okay, that's a new one for me...  Colophony Resin? 

What is that stuff and where can you get it? I am willing to give 
just about anything a try - this if fun....

Till, see my newest post about fixing traces :-(

Chris






--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
>
> On Tue, 25 Oct 2005 20:52:49 +0200, lcdpublishing  
> <lcdpublishing@y...> wrote:
> 
> > Sitting here looking at my etched boards with the toner still on 
them,
> > I got to thinking that I could leave it there.  Use a Q-tip to 
remove
> > the toner from the solder pads and leave the rest there.  This 
might
> > help to reduce oxidization of the copper?
> > I suppose there could be a problem with the toner melting and 
flowing
> > back into solder joints as you add components though.
> > Just an idea, curious if anyone has tried this and if they had 
any
> > success.
> > Chris
> 
> 
> I would be afraid of acid residue trapped/caught by the toner.
> After etching and rinsing i scrape the toner off with a steel 
scraper,  
> much less messy than acetone. I wipe off the last remains with 
that, if  
> there are any.
> 
> Then i coat it with a mixture of colophony resin and alcohol, 
which  
> prevents oxidation and acts as a flux.
> 
> ST
>