Homebrew PCBs

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