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Thread: kodak Tmax RS developer formula

  1. #31
    Drew Wiley
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    Sep 2008
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    Re: kodak Tmax RS developer formula

    Yep, that's a LOT of developer at once. Definitely commercial. Here labs have recently been using Xtol for their dip n' dunk machines. I've always done b&w film dev myself, one little batch at a time.

  2. #32

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    Sep 2014
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    Montreal, Canada
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    Re: kodak Tmax RS developer formula

    Hello everyone,

    Just reviving this as in John Sextonís latest newsletter, he indicates he has been doing some preliminary development tests using the current/latest reformulation of the regular TMax developer (ie the non-RS version) with TMax films and so far he is not seeing dichroic fog issues.

    Of course these are preliminary tests/evaluations but this is certainly something you might want to test for yourself if you have been impacted by the discontinuation of TMax RS.

  3. #33
    Drew Wiley
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    Sep 2008
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    Re: kodak Tmax RS developer formula

    I still have an unopened bottle of concentrate of the original RS. Wonder if it's still any good. For those relatively few lab applications I actually needed that, I simply settled on a tweak of HC-110 instead, which isn't going to deliver quite the same linearity to the characteristic curve, but seems close enough, and is a lot more practical. Problem is, HC-110 has now been reformulated, and I don't know if any performance variable has been affected in the transition. I still have enough of older formula to sustain me awhile. The concentrate seems to keep well a very long time in a partial bottle, at least in the traditional version.

  4. #34

    Join Date
    Jul 2006
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    Central Mother Lode, California
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    Re: kodak Tmax RS developer formula

    Quote Originally Posted by Michael R View Post
    Hello everyone,

    Just reviving this as in John Sexton’s latest newsletter, he indicates he has been doing some preliminary development tests using the current/latest reformulation of the regular TMax developer (ie the non-RS version) with TMax films and so far he is not seeing dichroic fog issues.

    Of course these are preliminary tests/evaluations but this is certainly something you might want to test for yourself if you have been impacted by the discontinuation of TMax RS.
    I was about to reply along these lines.

    Anyway John Sexton's newsletter may be read here: http://www.johnsexton.com/newsletter07-2021.html

    Note that he describes the tests he and his wife did as PRELIMINARY (the caps are his).

    Thank you Michael for saving me from typing quite so much.

    David

  5. #35
    Drew Wiley
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    Sep 2008
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    Re: kodak Tmax RS developer formula

    Hmmm.... thanks for the link. But on John's site, I also stumbled onto a link to the background story behind, Yosemite and Range of Light, my very favorite AA book. I'll try to watch the whole flick later in the day. But I find it strange that the re-formulators at Kodak never kept John in the loop as per exactly what they intended to do, since he was so instrumental in promoting the whole TMax concept to begin with. A generational gap, I suppose. Things always seem to get out of step that way.

  6. #36

    Join Date
    Sep 1998
    Location
    Mobile, AL
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    530

    Re: kodak Tmax RS developer formula

    Quote Originally Posted by Drew Wiley View Post
    I still have an unopened bottle of concentrate of the original RS. Wonder if it's still any good. For those relatively few lab applications I actually needed that, I simply settled on a tweak of HC-110 instead, which isn't going to deliver quite the same linearity to the characteristic curve, but seems close enough, and is a lot more practical. Problem is, HC-110 has now been reformulated, and I don't know if any performance variable has been affected in the transition. I still have enough of older formula to sustain me awhile. The concentrate seems to keep well a very long time in a partial bottle, at least in the traditional version.
    Drew, I had three unopened bottles of concentrate of the original RS that expired 06/2018 that I tested and it was still good. I used it on a project I shot at my late father-in-law's house April 2021- June 2021 and the negatives turned out good. My dilution was 1:7 from the concentrate so depending on its expiration date your bottle may still have some life in it.

  7. #37
    Drew Wiley
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    Re: kodak Tmax RS developer formula

    I only used TMax RS for developing very nitpicky precisely matched color separation 8X10 TMax100 sheet film negatives. So before trusting that bottle, I'd have to do a critical test and check it with a densitometer first. I'm sure this bottle is at least a decade older than yours. But I don't have time for that kind of project now. All my recent color to black and white conversions have simply involved TMax or FP4 internegatives from LF chrome film shots, for sake of ordinary silver b&w printing, a much less critical application which HC-110 is plenty competent for.

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