I have not followed the thread, so maybe this is not a suitable answer.
Some printers use fuser oil on the fuser roller. maybe your toner surface
is contaminated with that?
ST
On Thu, 29 Jun 2006 04:58:53 +0200, dagmargoodboat
<
dagmargoodboat@...> wrote:
>
> Thanks Robert,
> I thought that too, and decided to test the idea. Wanting
> to eliminate board prep, as well as transfer pressure,
> thermal mass, temperature, and a bunch of other variables
> from the equation, I cut another identical image--printed
> on the same panel--then tried adhering the decorative
> transfer foil I'd mentioned before.
> Namely, I wanted to first answer the question "Will the
> toner adhere to anything?" Foil adhesion is quite easy
> compared to transferring toner to a PCB.
> I found the toner does ∗not∗ always fully accept the
> decorative foil. The foil shows the same defects as the
> failed-transfer boards. To rule out defects in the foil,
> I tried shifting it around, exposing new areas to the
> bare toner areas. Still no transfer.
> I'm considering whether there might be some sort of toner
> surface contamination. The failed panels, however, came
> from the same sheet as the perfect panel. Still thinking
> about this...
> My board prep ∗was∗ slightly lax--stainless steel
> potscrubber, with soap, then Comet cleanser, towel
> dry--but it's robust enough to cut through the dull
> oxide and leave a mirror finish on the Cu. Same
> procedure as used on the "perfect" trial board.
> I'll post any fixes I devise.
> Thanks again Robert,
> James