From: Carl Weese (cweese@earthlink.net)
Date: 08/18/03-02:44:36 PM Z
Kevin,
Looking it up in TNPP, I find I recommended that TMY be developed in Jobo
Expert drums for nine minutes at 70 degrees in ABC+ (rollo) pyro formula to
produce negatives intended for platinum/palladium printing. I did that
testing about six years ago so it should be used as a starting point only:
do your own tests with fresh materials.
With a convenient nine minute time I see no point in raising the
temperature. The ABC+ formula itself takes care of the oxidation
problem--that's what the formula is for. Using ABC+ is a little more tricky
than using PMK in trays. The stock solutions should be allowed to mature for
a couple days after mixing, and the mixed amount should be used up in a few
months because it tends to gain activity after that. The working solution is
of course a one-shot.
---Carl
--
Web site with picture galleries
and workshop information
http://www.carlweese.com
From: Kevin Won <wonk@ohsu.edu>
Reply-To: alt-photo-process-l@sask.usask.ca
Date: Mon, 18 Aug 2003 12:52:08 -0700
To: alt-photo-process-l@sask.usask.ca
Subject: TMY dev time for rollo at 80 degrees?
I just purchased a Jobo and will be using it to dev negs bound for Pd.
printing in expert drums with rollo, which I've never used. I'd like to use
the developer a little warmer if possible. Questions:
(1) Is a higher temp (80 deg or so) a good idea? I'm thinking that with the
oxidation of pyro that it might be better to user it hotter and expose it
less to the air.
(2) if so, what's a good starting point to dev time?
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