Homebrew PCBs

ah yes, after searching I see your posts and discussion.
Hopefully someone will try this out. I have an old epson in a box that 
maybe I can sacrifice.
Anybody know where I could get some of that staedtler red in bulk? 
I've not yet researched this so still need to Google it...
-Ted


--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> On Mon, 15 Mar 2004 12:17:16 -0000, Ted Inoue <ted@s...> 
> wrote:
> 
> > I've been following this thread with interest. Seems that direct
> > printing of a PCB mask is something of the holy grail to us 
homebrew
> > types.
> >
> > One thought just occurred to me. Since they sell pens that you can 
use
> > to draw your own layouts (i.e. Sharpie pens), how about finding 
out
> > what ink is used in those and fill an ink cartridge with that?
> >
> > I know this is obvious, but I've heard lots of other complex 
formula
> > that don't seem to work and lead to clogging. The Sharpie ink 
seems
> > based on a volatile solvent that dries very fast. The solvent may 
also
> > help to resolve head clogging problems as it might be a 
self-cleaning
> > solution. One problem I can see is that it may be so fluid that it
> > would just drain out of the cart. But perhaps this could be 
resolved
> > by altering the vent ports to allow less air in.
> >
> > Hope somebody figures this out.
> > -Ted
> >
> >
> 
> I suggested a few hundred times staedtler red, i have no sharpie pen 
here 
> and
> i think it is similar.
> Maybe in the other mail from pebo is a comment on it (i still need 
to 
> read).
> I agree that it is a obvious thing to try as it is known to work as 
a 
> resist.
> 
> ST