dark streaks on negs

Discussion in 'B&W: Film, Paper, Chemistry' started by cdat, May 31, 2009.

  1. cdat

    cdat Member

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    I developed 2 rolls of Tmax 120/iso 100 today. Had a dark streak running vertically on about 1/3 of the negs, right hand side, 1/4 in on some, 1/3 in on others. Shot on a mamiya rb67, 150 mm lens. They almost look like a light leak, except they aren't on every neg. Could they be from mishandling the film? I develop exactly, (or as close as I can) every time, have not seen these before, it is not the pattern I have seen when my son-in-law let his film touch on the roll. I will scan the negs and post them tomorrow when they finish drying.
    thanks
     
  2. Christopher Walrath

    Christopher Walrath Subscriber

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    Maybe the dark slide was not fully inserted?
     
  3. MikeSeb

    MikeSeb Member

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    I second a dark-slide problem. Could be a problem with the dark-slide lip seals.
     
  4. cdat

    cdat Member

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    Bingo, thanks. I switched backs, no more streaks. Now all I need to do is figure out how to repair the 120mm back.