Homebrew PCBs

Why not just a brush and a few coats of  India Ink or paint. You can 
make a mask if you can't do it free hand. A good bush with long bristles 
is easier to use than it looks.

Gordon

dl5012 wrote:
>
> Hi John,
>
> Don't bother trying the ultrafine point Sharpie markers. The ink
> doesn't work as an etch resist... Same goes for the "huge" chisel
> point industrial marker. I thought that tip would be good for going
> over large copper fill areas...
>
> I've used the black fine point Sharpie as an etch resist for
> decades. For narrow traces, I've used slots cut in transparencies
> as templates. I use an eraser shield and a firm eraser to clean up
> the edges. Eraser shields are surprisingly difficult to find these
> days; drafting (drawing by hand) must be becoming a lost art. The
> last batch I bought at a craft store; poor quality with sharp edges,
> but better than nothing. In a pinch, you could use a transparency
> with slots cut out.
>
> Another option is to use "Ruby" tape. This is a red transparent
> tape they used to use this in the old days to layout PCB (and
> integrated circuit layout) by hand. It works fine as long as you
> don't have any "crossings" where etchant can get under the tape.
>
> Yet a third option is to locate some rub-on transfers. I have some
> sheets that have traces and pad patterns (but haven't seen them for
> decades...).
>
> Regards,
> Dennis
>
> --- In Homebrew_PCBs@yahoogroups.com 
> <mailto:Homebrew_PCBs%40yahoogroups.com>, "Jan Kok" <jan.kok.5y@...>
> wrote:
> >
> > I believe there is an "ultrafine point" sharpie.
> >
> > I haven't tried it, but maybe you could cut two sides off a "fine
> > point" sharpie with a razor blade, to get a very narrow tip.
> >
> > Cheers,
> > - Jan
> >
>
>