I've seen some posts here about people doing
the Laser Printer heat toner-transfer to PCB with
the special sugar coated paper, but I've been
doing it for quite a while with just plain
regular paper.
The only difference is that the paper doesn't
float right off the PCB in water. You have to
soak the board in water, let the paper soften
then gently rub it off.
In our experience, the traces stick to the PCB better
with this method in comparison to using the special paper.
I've done many boards reliably with 10 mil traces.
A few weeks ago, I posted a msg to another group:
http://groups.yahoo.com/group/argnj/message/447There are also pics of an example board at
http://photos.groups.yahoo.com/group/argnj/lstunder the "Laser Toner PCB Etching" folder.