film holders - what type plastic?

Discussion in 'Large Format Cameras and Accessories' started by smieglitz, Feb 18, 2008.

  1. smieglitz

    smieglitz Subscriber

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    Anyone know from what sort of plastic Lisco & Regal, etc., film holders are made? I'm going to modify some and want to get the best adhesive match for the purpose.

    TIA,

    Joe
     
  2. Ian Grant

    Ian Grant Subscriber

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    Joe, I've just repaired some using Superglue, but a solvent type cement would be better. A few years ago I dissolved some 120 plastic spools in cellulose paint thinners and made a repair cement to fix some developing tanks, this worked extremely well, 25 years later the tanks are still robust.

    Ian
     
  3. David A. Goldfarb

    David A. Goldfarb Moderator Staff Member

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    So wait a minute--are you saying you've solved one of the great photographic mysteries? There really is a use for old 120 film spools.
     
  4. Ian Grant

    Ian Grant Subscriber

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    Err yes :D

    Actually I used to dissolve them in an old 100ft 35mm film can, lasted for monthss, and best of all it's a light tight adhesive/cement.

    Ian
     
  5. richard ide

    richard ide Subscriber

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    I just tested Methylene Dichloride on a holder and would suggest that it is probably one of the best to use. It is the solvent cement used for acrylic. Try Home Despot or a sign shop might give you a bit. Just make sure you have a good fit between pieces.
     
  6. smieglitz

    smieglitz Subscriber

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    zat like Weld-on 3?
     
  7. richard ide

    richard ide Subscriber

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    It looks as if it might be the same product. I would google the chemical name so that you can be aware of the hazards involved in its use. Very unpleasant to get a trace in your mouth (BTDT) as it is about 200,000 times sweeter than sugar.

    The easiest and most accurate way to apply it is with a hypodermic syringe. Plastic suppliers sell all glass ones and blunt needles. You can use disposables from the drug store but the rubber seal degrades rapidly. You can also get a one ounce bottle with a needle.
     
    Last edited by a moderator: Feb 18, 2008
  8. John Kasaian

    John Kasaian Member

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    I've used gray PC-7 to repair a badly damaged 8x10 Lisco Royal. A little black paint and it looksed like new---and that was 5 years ago---that holder is still going strong btw.