Black streak on last few frames

Discussion in 'B&W: Film, Paper, Chemistry' started by chrishunt, Mar 18, 2013.

  1. chrishunt

    chrishunt Member

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    Greetings! I've got a black streak on the last couple frames in a roll of 120. You can see that it's on the film leader as well (not the spool side).

    Does anyone know how this might happen? It seems like maybe the film stuck together during processing? If that's the case, what are some methods you use to help avoid this?

    Thanks!

    negatives.jpg
     
  2. Neal

    Neal Subscriber

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    Hello Chris,

    Looks like a light leak. The film might not have been wound tight enough or possibly a nick in the paper at the edge. It doesn't look like it's your camera because it changes position in each frame.

    Neal Wydra
     
  3. MattKing

    MattKing Subscriber

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    I agree.

    Welcome to APUG.
     
  4. chrishunt

    chrishunt Member

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    Excellent, thank you. I need to find some 120mm film cases or something. Or just get better at taking the film out. :blink:
     
  5. kevs

    kevs Member

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    Hi Chris, and welcome to APUG,

    Your problem looks to me like an in-camera light leak. Does this happen on every film? Light leaks can be very elusive, and may only cause a problem if (say) bright sunshine hits the camera at a certain angle.

    What camera are you using? It might be useful info because others may have had similar problems with that model or make, and light seals do vary in quality and deteriorate with age and general wear.

    If this only appears on the final few frames, check the camera's light seals around the areas where the spools are seated; but check them all anyway! I had a similar problem with my Yashica TLR, which only occurred on the first four frames of a film. As the width of the feed spool decreased, the film was moving away from the light leak. I replaced the seal around the door and it was gone.

    You might run another roll through the camera and see if you can replicate the problem if you haven't already done so.

    Cheers,
    kevs
     
  6. Gerald C Koch

    Gerald C Koch Member

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    A piece of aluminum foil works very well and can be used several times if one is careful.
     
  7. chrishunt

    chrishunt Member

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    This is only my second roll of film through this camera, but the first roll had no issues. I should be able to finish and develop a third tomorrow, so I'll have a look.

    It's definitely an older camera. I'm using a Rolleiflex 2.8E.

    Great, thank you. I only see the problem on the last 3 frames shot (the three furthest from the center of the spool, non-tape side).

    I'll see if this next roll has the same issue. It seems like a nice test would be to stick a fresh roll and rotate the camera in the sun?
     
  8. Worker 11811

    Worker 11811 Member

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    I bet the flap at the tail of the roll wasn't wound tight enough or that there was a wrinkle in the paper backing.

    Assuming this is true, the solution is to make sure you wrap the tail nice and tight then fasten it down well.
    If the adhesive band doesn't hold the tail tight a piece of tape will help.

    If you need a safe place to keep exposed 120 format rolls, save the box they came in.
    They're not perfect but better than nothing.
    Aside from a little extra protection, they give you a place to write notes.
     
  9. polyglot

    polyglot Member

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    Looks like a light leak during processing to me.
     
  10. kevs

    kevs Member

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    Yes Chris, that would be a good test of the camera's light seal. You could also shine a bright torch/flashlight around the edges of the door to produce the same result.

    I'm sitting here with my Yashica 124G open in my lap!

    You can lay the negative strip you scanned in the camera, line up the exposed fames with the imaging area (image upside down, emulsion down of course!), and you should find your light leak about half a frame away from the imaging area. I think your problem lies at the base of the camera, between the imaging area and the unexposed film-feeding spool. The feed spool might account for the straight edge on the fogged area, which would place the leak right against the feed spool. This would explain why it's only occurring at the end of the film; the bulk of the film will block the leak until it's almost used up.

    The other thing that could account for the straight line is the roller at the edge of the imaging area, but I don't think the leak is there as it's too far from the edge of the frames.

    Update: According to this website, http://www.butkus.org/chinon/rollei/rolleiflex_28_e/rolleiflex_28e.htm , the second image down shows a roller between the feed spool and the imaging area. I now suspect it's this that is causing that straight line on the flare. That roller isn't on my Yashica.

    The reason I don't think it's a post-exposure problem is that the pattern is regular, occurring at the same place on each frame and on the unexposed end frame. Processing fogging, or that from loosely-wound film and torn paper backing, usually occurs much more randomly.

    I hope you manage to track down the problem. Have fun with your lovely camera. :smile:

    Cheers,
    kevs
     
    Last edited by a moderator: Mar 19, 2013