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Thread: Norma 8x10 back light seal replacement material

  1. #1

    Join Date
    May 2000
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    Tamworth, Staffordshire. U.K.
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    Norma 8x10 back light seal replacement material

    Hi,
    My 8x10 Norma back is showing its age and whatever material the factory used as a light seal is disintegrating. Has anybody here carried out a replacement job on one of these backs, if so what material did you use?
    Thanks,
    Pete.

  2. #2

    Join Date
    May 2015
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    SooooCal/LA USA
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    Re: Norma 8x10 back light seal replacement material

    Send a picture... There are many common materials that work well for light sealing material... Should be able to match up something...

    Steve K

  3. #3
    Drew Wiley
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    Sep 2008
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    Re: Norma 8x10 back light seal replacement material

    I did a seal replacement inside a 6x7 SLR yesterday which was about twenty times trickier, esp with my arthritic fingers. A Norma should be easy. I used a citrus based solvent to remove most of the old seal, rinsed that off with alcohol, then finished the residue removal with film cleaner. Let things dry well. The replacement gasket had acrylic adhesive one side with a pull off tab. That kind of thing has to be pressed on firmly without stretching, then left to "set" for at least 24 hrs. I've also used various industrial gasket materials for bigger cameras. Don't use anything that creates lint or decomposes with moisture or UV like common weatherstrip material. If your peruse the tech page at the start of the gasketing section of a McMaster catalog (on their website), there are good descriptions ofthe physical properties of various applicable materials.

  4. #4

    Re: Norma 8x10 back light seal replacement material

    I did this with a 5x7 norma, and used light baffles from microtools.

    http://www.micro-tools.com/store/~/C...ht-Baffle.aspx

    I think I used a baffle that was 1mm thick, but you may want to measure your camera to see what would fit.

  5. #5

    Join Date
    Feb 2000
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    Reykjavík, Iceland
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    Re: Norma 8x10 back light seal replacement material

    I spoke with a technican at the Sinar factory about this problem 8 years ago. The material they used for light sealing on the Norma was no longer availible. He recommended knitting wool of good quality as a substitude.

  6. #6

    Join Date
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    Re: Norma 8x10 back light seal replacement material

    Many thanks for all the good advice.
    Pete.

  7. #7

    Re: Norma 8x10 back light seal replacement material

    Yes I redid the light seals on my 8x10 Norma a couple of years ago.
    I settled on black adhesive foam rubber. I have a variety of thicknesses and types around.
    Just whatever you use make sure the silver spring clips are not strained. Mine were when I first got it.
    “The secret of getting ahead is getting started.”
    ― Mark Twain

  8. #8
    William Whitaker's Avatar
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    May 2002
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    the Southern Part of Heaven
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    1,300

    Re: Norma 8x10 back light seal replacement material

    I have used a good quality ribbon from a piece goods store. Find one that has a good nap on one side. It can be secured with contact cement used sparingly.

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