Negative Defects

Discussion in 'B&W: Film, Paper, Chemistry' started by Chiron1, Feb 17, 2011.

  1. Chiron1

    Chiron1 Member

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    Hi,

    I developed three roles of film in three different tanks and they all turned out the same greenish cast on the emulsion side and gray on the plastic side.

    I checked my exposure, temperature, development time, and sufficient agitation were all correct.

    Could the D76 developer stock (diluted 1:1) was too weak? I used 11 min for Ilford HP5 ISO 400.

    I used a Patterson two reels tank system and loaded one reel with film and inserted the second reel without film. I used a total of 10 OZ of working solution. Perhaps the problem was loading the empty second reel that prevent the 10 OZ of working solution to properly develop the loaded reel.

    I did not mix the D76 and is available in a shared darkroom (without supervision) in a community college.

    Thanks so much for any suggestions,
    C.
     

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  2. Rick A

    Rick A Subscriber

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    Possibly under fixed. How old is your fixer, and what time did you use.
     
  3. Greg Davis

    Greg Davis Member

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    That is unfixed film. Run it through the fixer and washing steps again to clear it. Use fresh, unused fixer if your school recycles it.
     
  4. Chiron1

    Chiron1 Member

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    The fixer is in a 10 gallon tank. A second 1 gallon container is used for film and paper. I tested and checked the fixer and it was not cloudy. I fixed for 8 min., Agitate first 30 second non-stoop. Agitate 10 seconds each minute. Also used Hypo for 2 minutes.
     
  5. Chiron1

    Chiron1 Member

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    The fixer in the 10 gallon tank was made in Dec 2010
     
  6. Greg Davis

    Greg Davis Member

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    That doesn't change the fact that the film is not fixed. Dead developer causes completely different issues than what you show. To be sure about fixer quality mix a fresh batch of fixer and do it again.
     
  7. MattKing

    MattKing Subscriber

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    Try a fixer clip test on a piece of leader.

    Put a drop of the fixer on the film leader and wait until the area under the drop goes clear.

    Then immerse the leader in fixer, agitating regularly.

    Time how long it takes for the clear area under the drop to be indistinguishable, and the rest to clear.

    If it is a traditional type of film (HP5+ is fine) it should be about 3-5 minutes.

    If it is much longer, or doesn't clear at all, the fixer may have been contaminated.
     
  8. ozphoto

    ozphoto Subscriber

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    I agree with the other comments - it appears to be poorly fixed film. Matt's suggestion as to how to test fixer is one I use often.
    Re-fix in freshly made fixer, wash, use some Photoflo and I'm pretty sure you'll see the difference immediately.
     
  9. tkamiya

    tkamiya Member

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    All kinds of strange things happen in shared darkrooms. Well, strange things happen in my personal darkroom, too, but that is entirely a different story!

    Look at the margin of the film. If fixer worked, that part, unexposed, will be totally clear. It isn't. That means fixing process didn't work for whatever reason.