Compensating developer for rotary processor?

Discussion in 'B&W: Film, Paper, Chemistry' started by alanrockwood, Jan 20, 2008.

  1. alanrockwood

    alanrockwood Member

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    Is there any developer that works as a compensating developer in a rotary processor, ideally one that works at 75 degrees?

    Yes, I know the basic ideas behind stand and semi-stand developing, but I am still wondering if compensation is possible with continuous agitation.

    Also, might as well throw edge effect into the discussion as well...

    Thanks.
     
  2. dancqu

    dancqu Member

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    Compensation with continuous agitation is much compromised.
    Local depletion of developer is minimal and bromide inhibition
    lessened while high ph levels are maintained. Dan
     
  3. MikeSeb

    MikeSeb Member

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    Dan is correct of course, However, I've used divided D76 in a Jobo with good results. It may not meet everyone's definition of a true compensating developer, but it's worth a try.
     
  4. Baxter Bradford

    Baxter Bradford Member

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    Yes there are Alan. There's plenty of info in the archives, suggest you search using Pyrocat and Jobo.
     
  5. frotog

    frotog Member

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    I've done tri-x and ab 55 in a jobo. It works.
     
  6. Edwardv

    Edwardv Member

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    Do you increase water by 50% for solution A or not? Thank you.
     
  7. Philippe-Georges

    Philippe-Georges Member

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    Apologize me for my ignorance, but what is "ab 55"?
    I did a search on this forum and there were no matches.

    Philippe
     
  8. frotog

    frotog Member

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    Cachet's ab55 is a phenidone version of divided d76. It's panthermic meaning temp has little effect on development. In tanks it's a true compensating developer, giving superior results to diafine and formulary's divided d76. Development can be controlled by making more dilute or less dilute working solutions of the "A" bath. While best results are obtained in tank inversion processing it will indeed work with a jobo. I use mine at the slowest rpm (except when introducing the "b" bath) and yes, I do dilute the "a" solution...anywhere from 1:1 to 1:.5.
     
  9. steve simmons

    steve simmons Inactive

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    Try Rollo Pyro. It is designed for rotary processing.

    steve simmons
    www.viewcamera.com