Kodak Fixer exhausted

Discussion in 'Kodak' started by k, Jul 14, 2003.

  1. k

    k Guest

    I would like to know how many rolls Tmax400 (24 exp) it takes to
    exhaust 1 liter of Kodak Fixer solution?
    k, Jul 14, 2003
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  2. If it's Kodafix you are using, it will fix about 18 rolls of 24 per
    James Robinson, Jul 14, 2003
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  3. k

    Mark A Guest

    This info is available on the Kodak web site.
    Mark A, Jul 14, 2003
  4. I had one of those revelations while sleeping, when it hit me that I
    didn't do the calculation right. Here's another attempt:

    Kodafix has a capacity of about 100 sheets of 8X10 film per gallon of
    working solution (1:3 dilution). Therefore, since 3 rolls of 24
    exposure film are the equivalent of two 8X10 sheets, the fixer would
    have a capacity of 150 rolls of 24 exposure per gallon. That works out
    to about 40 rolls of 24 exposure film per liter.
    James Robinson, Jul 14, 2003
  5. k

    Jorge Omar Guest

    Just a note:
    I've been using Kodak Polymax fixer for films.
    I went 'old' - lost its fixing capacity much earlier than it went
    exausted - for instance, only 5 rolls/liter in about 2 months.

    Since this happened twice, I stopped using it and now mix the old F-9

    Jorge Omar, Jul 14, 2003
  6. got exhausted?.
    There is no definite number because it depends on the
    emulsion and actually, on how much of the silver has been
    exposed and developed. The Kodak number is 100 8x10 sheets
    per gallon, but it doesn't state if this is paper or film. I
    think its for paper.
    This is actually very optimistic for either if archival
    fixing is desired. The fixing bath will leave some of the
    silver halide in the form of insoluble complexes if the
    fixer has too much silver dissolved in it. A good test is to
    fix a scrap of undeveloped film. Soak the film in water for
    a few minutes and then fix it in _fresh_ fixer until its
    clear. Note the time it takes. Test the fixer periodically.
    The old recommendation is to discard the fixer when the
    clearing time doubles from that of a fresh bath. I think 1.5
    times is probably closer.
    To get the best fixer economy and insure complete fixing
    use two successive baths. The first does most of the work,
    the second stays fresh enough to finish off any complexes
    left in the film.
    Kodak has instructions for two bath fixing in its
    publicaton _The Kodak Black-and-White Darkroom Dataguide_.
    Films like T-Max and Tri-X are harder to fix than other
    films and fixing baths have less capacity for them than for
    most films.
    Richard Knoppow, Jul 15, 2003
  7. k

    Mark A Guest

    Kodak publishes exhaustion rates on their website. However, they may not be
    applicable for Tmax films since Kodak recommends Rapid Fix for these films,
    and specifies that they be fixed longer than conventional films. But check
    out the Kodak info for more information.
    Mark A, Jul 28, 2003
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