When it comes out hot from the fuser, you could try using something
to press the paper into the voids (like edges of the traces.
Something with a 20-30 mil radius would probably work. My guess is
all you need is a quick contact when the toner is molten and it will
stick enough.
I was having some adhesion problems on etched FR4 material for the
legend which is why I used the 600 grit on it. I do a hot peel on
the legend print, by the way.
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> On Wed, 23 Jun 2004 17:45:29 -0000, Phil <phil1960us@y...> wrote:
>
> > I've had good luck putting legends over traces by burnishing with
the
> > edge of the iron. (not sure if thats the correct term). After
> > ironing on the legend, I tilt the iron and rub with the thin edge.
> > It forces the paper to make better contact. You could probably
use
> > anything with a reasonably small radius on a hot board/paper
assembly
> > but you'd have to work fast before the board temp dropped below
the
> > fusing point.
> >
> > I also prep the etched board with emery cloth - currently using
600
> > grit. This roughens it up and creates more surface area for the
> > toner to cling to.
> >
> > It works quite well, I can get really good adhesion of the legend.
> > I've got a picture around here some where, if I find it I'll post.
>
> i prepare the copper with 600grit paper for the initial transfer
for
> etching,
> i thought i can omit this step for the legend.
> The toner seems to hold very well t th gh epoxy surface where the
copper
> was.
>
> I'd like to not use a iron and a rather tedious step in production,
> i will try a few things with the fuser and let you know...
>
> ST