Usually the yellow is from developer that has gone alkaline, but since you
say you changed developer, I'm not sure. Some times highly sized papers will
cause bleed off to stick, the actual yellow being a slight palladium stain.
On some papers I've found using one drop of Photoflow 200 in the emulsion
for @ 35 sq inches of print (5x7) helps control bleed.
We wouldn't ever suggest double coating for any reason but for the benefit
of the photographer. (big grin)
Our theory is that most platinum printers print to their budget, so any
cost savings or chemical efficiencies that we can introduce, would have very
little impact on sales, people would print more and bigger that's all. My
Ziatype process, obviates the need for platinum to achieve neutral blacks
and needs no large amounts of developer or clearing agents, which as many
printers can attest, can add up. I also believe printers will achieve a
higher hit ratio of good to bad prints. They'd never put me in charge of a
big oil company with this philosophy, but we think it adds up to more sales
in the long run. It's a little known fact that if you are printing on
heavier papers, usually for large 20 x 24 prints and larger, you san add as
much as 30% (sometimes more) water to the emulsion with no discernable
effect. We convinced Akins and Ludwig to try this on their large prints and
they stuck with it. I think they settled on a 25% water addition. I free
print for every four can add up, especially if you are doing 20x24's.
The Prague prints were nice and have a special place in our collection. Thanks.
DIck S.
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Dick Sullivan
Bostick & Sullivan
Santa Fe, New mexico