>When I started platinum/palladium printing in 1989, I used Palladio paper and
>chemicals. Palladio is a commercial platinum/palladium paper which is made
>and sold by Rob and Sura Steinberg of Cambridge, Mass. They sell a chemical
>which they call "brown toner" which is added to their citrate developer
>(?sodium ?ammonium). It works very well: one can get anywhere from a
>minimal brown tone up to a sepia effect with their paper or with hand-coated
Charlie,
Zinc compounds are supposed to have that effect, though I don't have a clue
as to what it might be. I have noticed that the "printout" method does not
respond to additives in the same way that develop out prints do. The color
of the print is due the fineness of the particles that are distributed into
the paper. My suspicions are as the print dries, the development development
process is restrained and ends up producing coarser browner particles.
I've confirmed that it is the drying out that makes the print warm by drying
a Ziatype print and exposing it dry, then steaming it. It develops out in
the steam, and very brown, thank you. You do not get a print out image to
judge exposure by, which is much of the advantage of the Ziatype.
Dick S.
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Dick Sullivan
Bostick & Sullivan
Santa Fe, New mexico