Homebrew PCBs

See Message #29099 on this board.

Let me know on results.

RD

--- In Homebrew_PCBs@yahoogroups.com, Kim Vellore <kimvellore@...> wrote:
>
> Richard,
>   There are a few types of Lacquer thinner available with different
> solvents in them. Which brand did you use?. I have a board coming up so
> might try your method.
> Thanks
> Kim
> 
> 
> On Sat, Dec 10, 2011 at 10:39 AM, Richard <rdheiliger@...> wrote:
> 
> > **
> >
> >
> > I accidentally ran across something that appears to help toner transfer.
> > Ran out of alcohol that I use to clean the board before laminating. Tried
> > lacquer thinner, and got great results. I have been able to reduce my
> > laminator temperature from 150 *C to 115 *C. and get perfect transfers. And
> > for the first time able to do .008 width traces, without them falling off.
> >
> > I use a random orbital sander with 400 grit paper to polish off the
> > corrosion.
> > Do a first clean with alcohol, to remove the dust left from sanding.
> > Then put a very liberal amount of lacquer thinner on the board, it looks
> > very wet.
> > Let the lacquer thinner dry, there is a haze left on the board from the
> > thinner.
> > Then do two passes thru my laminator at ~115 *C.
> > Soak paper off, and etch. When the paper is only heated to 115 *C it soaks
> > off much easier.
> > The toner is a bit softer and needs a little gentler rub when cleaning the
> > paper, but I can still use a plastic scrubby if I don't press too hard.
> >
> > Would be interested in finding out if others might get similar results,
> > and if any one knows what material may be left behind after the lacquer
> > thinner evaporates, it must have some kind of adhesive quality. What ever
> > it is does not slow the etch time. Lacquer thinner takes the toner off the
> > etched board very quickly too.
> >
> > RD
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>