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  1. #1

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    Sandy King just posted this on the alternative mailing list. Just in case he doesn't get around to posting here as well...

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    I just spoke to Dick Arentz about the question of UV blocking in Tmax 100 film. After being alerted to the potential problem of this film, first discussed on this list, he tested Tmax 100 with Pt/Pd and confirms that the effective UV blockage is approximately three full stops.


    So unless you lust after very long exposures you might want to eliminate this film from your sack of tricks for Pt/Pd printing, and most likely for all other alternative processes based on exposure with UV radiation.


    Just for the record, I have not measured any UV blocking of this magnitude in Tmax 400, or for that matter in any other films by Kodak or Ilford.


    Sandy King



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    Original source: The Alternative Mailing List, post by Sandy King

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    I knew there was a reason I hadn't switched to tmax from tri-x, hp5 and fp4

    Cheers,
    Ian

  2. #2

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    Quote Originally Posted by ian_greant

    I knew there was a reason I hadn't switched to tmax from tri-x, hp5 and fp4

    Cheers,
    Ian
    Tmy does not suffer from the same problem, it is my film of preference for 8x10 and pt/pd

  3. #3
    roy
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    [quote="ian_greant"]---------
    I just spoke to Dick Arentz about the question of UV blocking in Tmax 100 film. After being alerted to the potential problem of this film, first discussed on this list, he tested Tmax 100 with Pt/Pd and confirms that the effective UV blockage is approximately three full stops.

    What is it that causes this blocking ? Surely if the film is properly fixed and the magenta cast removed should it not act like other film ? Perhaps I am missing something !!
    Roy Groombridge.

    Cogito, ergo sum.
    (Descartes)

  4. #4
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    Apparently the film has a different coating on the base material. I wonder if the coating is the reason that Kodak says that Tmax100 has less blue senstivity than its other panchromatic films (which gives you more natural looking skies without the use of filters)?



 

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