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  1. #21
    jmailand's Avatar
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    Quote Originally Posted by PKM-25
    Any indications on when you think Dwaynes might be stopping it? I am looking at giving them about $6,000 in grant money to secure the chemistry.
    I got 4 exposed and 6 unexposed rolls in the freezer right know. They better be able to process the stuff. I'm going to send out the 4 exposed rolls this week, I hope it comes back.

    James,

  2. #22

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    Quote Originally Posted by jmailand
    I got 4 exposed and 6 unexposed rolls in the freezer right know. They better be able to process the stuff. I'm going to send out the 4 exposed rolls this week, I hope it comes back.

    James,
    They said that they will be able to process the film for up to 18 months after the announcement of the discontinuance of the film by Kodak. But I have suspicions about Kodak and what they are really up to so with over 1,000 rolls of this stuff, I have to buy my own lab basically.

  3. #23

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    You are assuming processing will be available. It is already difficult.

    Freeze it for best results

  4. #24

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    Processing Kodachrome has always been difficult. The only thing that has changed has been access and convenience.
    Honey, I promise no more searching eBay for cameras.

  5. #25
    PeterB's Avatar
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    Quote Originally Posted by naturephoto1
    I stand corrected. This source from Wikipedia indicates that 1 cm (.4 inches) of lead reduces the intensity of Gamma Rays by 50%:

    http://en.wikipedia.org/wiki/Gamma_ray

    Rich
    Lead lined bags will protect the film from any Terrestrial background Gamma radiation, however they won't protect film from the vast majority of Cosmic radiation.

    Did you know that Elle Macpherson stuck her baby in a lead lined cot because she thought it would protect her baby from cosmic rays?! (see [1]). I suspect that Elle and her muscle bound partner (carrying the cot) could benefit from a bit of physics.



    Different cosmic rays have different energies and the rarer more energetic ones aren't stopped by the amount of lead you would want to fill your freezer with (let alone a baby’s cot!). Lead is good at stopping X-rays and gamma rays, but not cosmic rays. From [2], we read "a substantial proportion of the cosmic radiation detected at sea level could penetrate over 1m of lead."

    Therefore, there isn't any reasonably thin or lightweight substance which offers meaningful protection against cosmic rays.



    Kodak discusses the effects of ambient background radiation here [3]



    The advice they give is "The only way to determine the specific effect of ambient-background radiation is to make actual tests or measurements by placing a detector in the location where the film is stored." As is the case with most posts I've seen, Kodak tends to make generalisations about film storage. I suggest this is the case because they wouldn't have conducted the necessary experiments required to support specific recommendations.


    One more thing, if you are going to be opening the freezer up often and you are really want to go to the n'th degree to protect from radiation, store the film in an air tight bag. I'll post more details later if anyone is interested.

    How long will the film last last? I suggest a nominal upper limit of about 32 years (for freshly frozen film) due to the chemical degradation; however I can't predict variations in effects from cosmic rays. To guard against this, always test your frozen film before shooting something memorable.


    regards
    Peter

    [1] http://www.contactmusic.com/new/xmlf...protect%20baby
    [2] [font='Times New Roman'][font=Verdana][size=2]http://www.prestoncoll.ac.uk/cosmic/...e/cascades.htm[/size][/font][/font]
    [3] http://wwwuk.kodak.com/US/en/motion/...age_cond.jhtml

  6. #26
    dmr
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    Quote Originally Posted by jmailand
    I got 4 exposed and 6 unexposed rolls in the freezer right know. They better be able to process the stuff. I'm going to send out the 4 exposed rolls this week, I hope it comes back.
    One of my co-workers phoned Dwayne's Photo asking just this. (Between us we have about 10 rolls.)

    They told him that there are no plans in the forseeable future to discontinue Kodachrome processing.

  7. #27
    mfobrien's Avatar
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    I recently shot a roll of KR-64 that expired in 1984. It probably was not refrigerated its entire life. The slides look pretty damn good.
    <a href="http://www.flickr.com/photos/mfobrien/200242827/" title="Photo Sharing"><img src="http://static.flickr.com/64/200242827_cc4c6ceb5a.jpg" width="500" height="333" alt="KR64-3.jpg" /></a>
    Mark O'Brien -
    At the home of Argus cameras...Ann Arbor, MI
    http://www.geocities.com/argusmaniac/

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