Homebrew PCBs

On Mon, 15 Mar 2004 12:17:16 -0000, Ted Inoue <ted@...> 
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