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  1. #1

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    Continuous agitation

    Hi

    I have read that Rodinal does not take kindly to continuous agitation (e.g.Jobo DuoLab).

    If this is so, does anyone have any suggestions for a good B&W developer that works well at 24C and continuous agitation.

    Regards

  2. #2
    Rick A's Avatar
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    Pyrocat-HD.
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  3. #3
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    I haven't heard that Rodinal has any particular problem with Jobos. It has a minor cult following of 'diluted standists' - which may have lead to an inadvertent rumor that it can't be rolled. But the real question is "Have you had any problems?"

    On the Pyro side, my experience has been that Jobo's with sheet film & spiral reels don't get along well with Pyro. Pyro is sensitive to agitation turbulence and there is quite a build up of density at the leading/trailing edges of the film. Rollo Pyro - which has a low rate of aerial oxidation - may be the best bet.

    Working very well in Jobos of all sorts are D-76 (ID-11), HC-110 (forgot the Ilford equiv.) and Microdol-X (Perceptol(?)). But they are so unsexy, no cult following at all.
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  4. #4
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    T-Max or, if you prefer a replenishment regime, T-Max RS.
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  5. #5
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    I use Xtol and HC-110 in a Beseler Drum with constant agitation and it works well. My experience with PMK Pyro make me think that constant agitation will work also.

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    Agree with Nicholas and MattKing. Staining developers can be problematic. With Pyro, Rollo Pyro is reputed to work ok in a Jobo. With Catechol, Pyrocat MC is supposed to work well. Other than that, most standard general purpose solvent developers will work fine. If you're going to use TMax developer in a Jobo make sure you use TMax RS.

  7. #7

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    exactly ...
    i wouldn't use tmax developer with sheet film,
    you will get dichroic fog, if you have to use tmax for your sheet film
    use tmax RS. it won't give you dichroic fog.

    good luck !
    john

  8. #8
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    you've probably been told to avoid rodinal because it exhausts quicker than other developers when used under constant agitation. Use two batches instead, one for the first 1/2 of development, one for the 2nd half.
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  9. #9
    MDR
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    You can use Rodinal with continuous agitation, you'll just loose a bit of acutance which is the main reason for using Rodinal. 24°C in Rodinal = Grain. Pyrocat P and PC were designed for rotary development. Jay de Fehr's 510-pyro can be used as well.

    Good Luck
    Dominik

  10. #10
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    Quote Originally Posted by irishwoodpecker View Post
    Hi

    I have read that Rodinal does not take kindly to continuous agitation (e.g.Jobo DuoLab).

    If this is so, does anyone have any suggestions for a good B&W developer that works well at 24C and continuous agitation.

    Regards
    Why do you want to use continuous agitation?

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

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