> I've also been successful in making my own gelatin POP from outdated
> commercial papers developing-out papers. Fix the paper well in a
> non-hardening plain thiosulfate bath (I use two in succession), then in
> hypo eliminator, wash extremely well, air dry, and then sensitize same
> as salted paper. You have to experiment - some gelatin coatings seem to
> be hardened too much, but most I have tried work satisfactorily. I have
> only tried fiber-based papers, not RC.
I experimented with printing out on Kodak Polycontrast III RC paper a
while back. I was curious if developing out papers would print out
without any special treatment or sensitization as mentioned in the
previous post. It does work, although not as well as a true POP. Fixing,
causes some fading of the POP image on this paper, and selenium toning
fades it even more. Nevertheless, it is an inexpensive way to play around
with the printing out process.
- Wayde
(wallen@boulder.nist.gov)