Disturbance on developed film

Discussion in 'The Darkroom' started by Dagfinn, Mar 10, 2009.

  1. Dagfinn

    Dagfinn TPF Noob!

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    Hello,

    Having tested an old Minolta SRT-101 for the first time, I have just developed a film of Ilford HP5 plus 400, and find to my surprise that all the negatives have these equally spaced dark fields which start at the wide end and fade into the image.

    http://img12.imageshack.us/img12/324/testisk.jpg

    What on earth has happened here?

    Thanks for any feedback.
     
  2. Dagfinn

    Dagfinn TPF Noob!

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  3. Battou

    Battou No longer a newbie, moving up!

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    Hair, I get it all the time.

    Wipe off the negitive before scanning/enlarging. Any that remain can be cloned out if absolutely necessary.
     
  4. JC1220

    JC1220 TPF Noob!

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    You will find that these correspond with the sprocket holes, if they are dark on the negative, they are a sign of light leaks. Search the forum for related words, I am sure there are a few threads showing the same thing.
     
  5. compur

    compur No longer a newbie, moving up!

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    Looks like you need to replace the light seals -- the foam strips that fit
    around the edges of the film chamber area. A common situation on Japanese
    cameras from the 60s-80s.
     
  6. Battou

    Battou No longer a newbie, moving up!

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    ...I missed that, holy crap.
     
  7. Dagfinn

    Dagfinn TPF Noob!

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    Light leaks! As I somehow suspected. Will some thick black tape along the chamber edges do the trick?
     
  8. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    You posted a postive image.

    As JC mentioned ... these streaks will appear dark on the negative ... and light on the print.

    Your positive image shows them as dark ... so I expect it to be light on the negative. If this is correct ... then this is not a light leak.
     
  9. compur

    compur No longer a newbie, moving up!

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    ^ Good point. It could be a developing issue. Perhaps over-agitation.
     
  10. randerson07

    randerson07 TPF Noob!

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  11. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    I would say that the developing tank was not agitated properly.

    I would guess that the dark areas are right under a sprocket hole.
    Developer has not washed down under the holes, thus causing underdevelopment.
     
  12. Actor

    Actor TPF Noob!

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    These are called "surge lines."

    From Mastering Black-and-white Photography by Bernhard J. Suess, Allworth Press, New York, 1995, pp 52-3.
     

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