Edges can be a problem even with a laminator. I've attributed those
problems to either not cleaning along the edge as well as I should or
not deburring the cut edges. The later is the more common problem.
If any of the copper is protruding above the rest of the surface the
rollers can give irregular pressure in that area and not fuse as well
as other areas. I debur the edges with a deburing tool and sand the
edges now when I cut down stock to be used. Rotating the stock
during multiple passes also helps to solve this problem. Also I
always print the board border when doing toner transfer. This helps
to minimize the pucker of the paper when it gets wet.
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> One edge of the pcb didn't work well. Toner not fused. Maybe bad
prepared
> or not constant pressure.
>
> But the rest almost looked like it may have resulted in a useable
pcb.