[pure-silver] Re: tmx 3200 problem
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 30 Dec 2009 14:12:53 -0800
----- Original Message -----
From: "Eric Nelson" <emanmb@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, December 30, 2009 9:51 AM
Subject: [pure-silver] Re: tmx 3200 problem
T-max 1:4 for 9.5 mins in a Jobo seemed right on the money
to me despite the frame # marking densities. The image
densities belie that appearance anyway but thanks for
throwing out some ideas.
I just spoke to Kodak professional folks and despite the
info of the film emulsion # and batch # of my tmax
developer they don't jump at the opportunity to send a
replacement batch as we might get from any other
retailer/manufacturer. The only info they offered was to
try the farmer reducer method laid out by Sexton or
re-wash and use a sponge to try to wipe it off, neither of
which is a workable method for multiple rolls of film in
my opinion.
In mentioning to them the citric/fixer combo which is
mentioned in several places on the interweb, and the
chemistry/film expert I spoke to said, 'welllll, citric is
a good chelater of iron...' He didn't seem to think it
would work but didn't say directly that it wouldn't.
The only prevention 'cures' offered were to make sure the
tanks are clear of silver deposits or to use tmax RS
instead of regular tmax developer. I recently ran Kodak
Developer System cleaner (chromate/sulphuric) through all
my tanks and reels so I doubt that is an issue.
I don't know who runs Kodak's pro contact service now
but I think they have lost touch. The rapid fixer with
citric acid is a Kodak recommendation and is in one of their
publications. Its a better choice than weak Farmer's because
it is very weak and stands less chance of ruining the image.
T-Max developer is not recommended for sheet films due
to dichroic fog. I have no idea why it should produce it on
sheet film and not roll film. The RS version has a silver
cheating agent in it but I also think it is a different
formula. The RS means Replenished System since it is
designed for self-replenishing in such applications as
photo-finishing. Since both are proprietary its hard to
know. The MSDS are not helpful. While it is possible the
developer is causing the blotching I think more testing is
needed. I suggest doing at least a clip test to see if it
comes out with the stain.
Overall, Xtol is probaby a better developer than T-Max.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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