Homebrew PCBs

>
> The toner is transfered to the drum inside the laser and then to the
> paper.  the toner is moved and held in place with a slight electrical
> charge.   The copper of the board would stop the process.

Not 100% true, but 50%.
remember? i printed on aluminum foil and 50% still transferred due to  
gravity and
pure luck. No enough toner with my machine, 50%.
The pickup charge is shorted, you are right.



>
> But... there may be a way to cover the board with a non-conducting
> film and print on that.

The large ground plane would still cause trouble with that charge.

>
> In my opnion, the best chance we have of a direct print is ink-jet.
> They already make ink-jet printers for printing on things like belts
> and hoses and metals and boxes.
>
> It seems that we have just not found a good combination of printhead
> and ink.
>
> Dave
>


I agree! i have this epson piezo printer sitting around just waiting until  
one
finds a ink. i tried staedtler red and it didn't work out.
There must be a ink!

ST