Cleaning Kodachrome slides?

Discussion in 'Darkroom Developing and Printing' started by Mark, Feb 17, 2004.

  1. Mark

    Mark Guest

    I have some 1940's vintage Kodachrome color slides that I want to
    clean, re-mount in Gepe mounts, and scan. Any recommendations
    on how to clean them safely? I tested one today in some warm
    water and Kodak Fotoflow. The emulsion appeared to bubble up,
    which made me nervous. It settled down again after drying, but the
    light areas (sky) look a bit "crazed." It may have already looked
    that way, I need to take a close look at some of the others.

    Mark, Feb 17, 2004
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  2. I'm pretty sure Kodak makes a film cleaner. It's not water-based.
    Andrew Koenig, Feb 17, 2004
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  3. Mark

    J D B Guest

    I'm pretty sure Kodak makes a film cleaner. It's not water-based.

    Kodak did, but I can't find it anymore. It was a good product.
    However, there are several similar products. Delta, Edwal, et al have

    I have used "Pec-12", for instance.

    J D B, Feb 17, 2004
  4. Mark

    Mark Guest

    I just bought a bottle of Rexton #3001 Anti-Static Film Cleaner.
    Will this do the trick?

    I also read a recommendation for a Kodak product called
    E-6 Final Rinse. Does anyone here have experience with that
    as a product for cleaning negatives?

    Mark, Feb 18, 2004
  5. Mark

    mp Guest

    I have some 1940's vintage Kodachrome color slides that I want to
    Most non-water based film cleaners will not swell the emulsion. I like to
    use PEC-12. It's an extremely volatile cleaner, which means that your slides
    are dry and ready to work with in mere seconds. And because there's no
    swelling, there's less risk of physical damage.
    mp, Feb 18, 2004
  6. If memory serves, Kodachrome of that era was lacquered after processing.
    That may be what you raised when you wet the slide. I do not remember how
    to remove it.
    Michael Creem, Feb 19, 2004
  7. 1940's and 1950's Kodachrome film was coated with either
    of two types of lacquer. The older one was soluble in a 5%
    sodium carbonate solution or in stock Dektol developer. The
    other was soluble in Carbon Tetrachloride, which was Kodak's
    recommeded film cleaner at the time. Kodak recommended that
    the film be tested with Carbon Tet first. If the laquer came
    off the cleaner could then be used to remove it all. The
    alkaline bath will cause the solvent type laquer to swell
    and craze, possibly damaging the underlying emulsion. In
    either case the film should be washed after removing the
    At the time Kodak made a lacquer for replacing the
    original. I have no idea of what to use now. In place of
    Carbon tet I would suggest 99% Isopropyl alcohol, which is
    Kodak's currently recommended film cleaner. A brief test
    will show if it works on the lacquer. Carbon tetrachloride,
    once a very common solvent and cleaning fluid, proved to be
    very toxic and also an environmental hazard. Even if it were
    easily available(which it isn't) I would strongly recommend
    staying away from it.
    You may possibly be able to get more information from
    Kodak. Their customer service number in the US is toll free
    1 800 242 2424, ask for extension 19 (professional service).
    Richard Knoppow, Feb 19, 2004
  8. Mark

    Mark Guest

    Is there any particular reason why I would want to remove
    the lacquer?

    Mark, Feb 20, 2004
  9. It yellows over time.
    James Robinson, Feb 20, 2004
  10. And I should have mentioned that the lacquer is sometimes attacked by
    mold where the humidity is high.
    James Robinson, Feb 20, 2004
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