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  1. #1

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    scratches on 120 negative

    Good morning everyone,

    Has anyone an idea how a negative can be scratched in a medium format back ?
    I have a contax 645 and nearly all the pictures have 1 and sometimes 2 lines across them :
    Click image for larger version. 

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    can it be the insert, I tougth the paper back would protect from scratches.

    Should I try to clean it ? with alcool base solution ?

    Thanks,

  2. #2
    Thomas Bertilsson's Avatar
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    Where are the scratches?
    "Often moments come looking for us". - Robert Frank

    "Make good art!" - Neil Gaiman

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  3. #3

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    If the scratches are on every film over a period of time and in the same place I would suspect the camera back, perhaps the guide rollers aren't rotating or something like that. If they are just on one film, or on a batch processed at the same time I would suspect the lab.

    Steve
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  4. #4

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    if you look at the first picture full screen, you can see the line acros the frame (vertical - between the knee and the boot and look above in the grass. ;-)

  5. #5

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    250swb, wouln't the paper back of the 120 film protect from scratches wit hthe rollers ?

  6. #6

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    and on the other photo it is horizontal (obviously) across the hands

  7. #7
    Thomas Bertilsson's Avatar
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    If the lines are that straight, where else could the film sustain damage like that? Have you tried different films with the same results?
    Surely it can't be from processing as the reels would move around enough to cause scratches that are much less uniform.
    "Often moments come looking for us". - Robert Frank

    "Make good art!" - Neil Gaiman

    "...the heart and mind are the true lens of the camera". - Yousuf Karsh

  8. #8

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    Indeed Thomas, as I'm new to all this I was wondering, I'll try and clean the back and insert before doing a new test roll

  9. #9
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    Quote Originally Posted by LucRoMar View Post
    Indeed Thomas, as I'm new to all this I was wondering, I'll try and clean the back and insert before doing a new test roll
    If the negs are scanned as an entire strip, feeding the negs through the scanner might cause damage like that.
    Depending on how the film was processed, when it's hung to dry some folks like to use a squeegee, which could also cause a reasonably straight scratch.
    But I would be suspicious of the film back.

    That gives you some places to look.
    "Often moments come looking for us". - Robert Frank

    "Make good art!" - Neil Gaiman

    "...the heart and mind are the true lens of the camera". - Yousuf Karsh

  10. #10
    AgX
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    Sparing a film, lookin at it conspicuously (optical means) before loading and after winding through and unloading would hint at a manufacturer's fault, a fault at the camera or at fault at later stage. That should make you somewhat wiser.
    Last edited by AgX; 04-05-2013 at 08:30 AM. Click to view previous post history.

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