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Thread: Pan B and Pan C

  1. #1
    Eric Rose's Avatar
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    I was looking thru some old kodak publications and they made mention of their panchromatic emulsions being classified as either Pan B or Pan C. Films such as Panatomic X, Plus X and Super XX sheet films were classified as Pan B. Pan C films were among others, Super XX roll and Tri-X.

    In most cases the filter factors were identical but a major exception was with red and deep red filters.

    I suppose with the advent of the new emulsions these old categories don't exist, but I was wondering if people still see a major difference in filter factors between Plus X and Tri X when using a red filter.

    What's your experience? How about FP4 and HP5?

    Eric
    www.ericrose.com
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    "civility is not a sign of weakness" JFK

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  2. #2

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    Wouldn't this just be related to red sensitivity? I wonder if these docs date from the time film moved from being Ortho only to being pan? Also isn't Techpan different in it's red sensitivity?



 

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