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Thermal fax paper for toner transfer

P

pimpom

Jan 1, 1970
0
The problem with using glossy paper for toner transfer to PCBs is
that of getting the paper off again, requiring lots of soaking
and scrubbing. Some time ago, I used a plain sticker paper whose
surface coating somehow looked as if it was not tightly bound to
the paper. It worked beautifully, needing only a minimal amount
of soaking and scrubbing. But I haven't been able to get that
particular medium again.

Today I had the idea of using thermal paper, the kind that comes
in a roll for use in fax machines. I use an HP LJ1020 and had a
problem with the paper jamming inside after the pattern had been
deposited. I fished it out and tried it anyway. It transferred
very well and the paper came off nicely with just a few seconds
of soaking and mild rubbing with my thumb. The heat-sensitive
coating blackened from the heat, but didn't transfer to the
board, so that's no problem.

I overdid the heat and pressure and smeared the pattern but it
looks promising. Backing it up with another medium may solve the
jamming problem and other printer models may not have the
problem. I had time for only one attempt before I had to give my
attention to other things. I intend to try again, but thought I'd
share it here now in case some of you want to experiment with
this method.
 
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