On Tue, 24 Feb 2004 15:41:49 -0500, Alan King <
alan@...> wrote:
> Stefan Trethan wrote:
>
>
>> Why the hell did it print on the aluminium foil?
>> simple standard kitchen foil.
>>
>> (i tried with a old toner cartridge containing tha drum also, the sharp
>> edges could possibly harm the drum.).
> > looks promising printing on copper, doesn't it?
>>
>
>
> Note the surface has to hold an electrostatic image to pick up the
> toner.
it has not to hold the image i think.
the electrostatic image is only at the drum.
the paper is charged the whole surface the same, no matter if black or
white.
then this charge attracts the toner from the drum (which is only present
where the black is).
ST
> Most oxides aren't that conductive, so would hold an image well enough
> for the
> time required. Copper oxide is a lot more conductive than most though.
Al. Oxyde is a good isolater, but i think aluminium foil is conductive on
the surface.
>
> Really it is worth trying though, may well be even the aluminum it's
> not
> really an oxide layer but fluxes etc from making the foil, although if
> the
> aluminum is bare it surface oxidizes very readily. Anything that is
> insulative
> enough to let it hold the image that will not later interfere with the
> etching
> after the toner is applied should work. It's something I've had on a
> list of
> things to try for a long time, but the paper toner method works great
> and I just
> haven't bothered. And to get the best bang out of this, modifying a
> laser
> printer to print straight on board would be idea. I have a spare laser
> printer
> or two just for this, but it's way on down the list of things to do for
> me. The
> paper method works and only leaves one laser printer sitting on my desk
> so it's
> hard to work on having two sitting there.. :) But laser straight to
> board would
> be excellent in the long run, I have a good spare 1200 DPI laser on hand.
>
> Alan
>