Film length and development

Discussion in 'B&W: Film, Paper, Chemistry' started by Bigpaul, Aug 19, 2009.

  1. Bigpaul

    Bigpaul Member

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    I've not used any length other than 36 exposures in 35mm since before the days of my home processing, so I'd appreciate some thoughts on the subject of development times for non-36 exposure films? Nearly all films seem to be 36 exposure these days, but I happen to have acquired some 24 exposure rolls of my favourite APX100. Now I'm wondering whether the development times (in Rodinal) would be the same as with 36 exposures? For conventional development, I use a single drum tank with 300ml; I'm assuming that with my usual 1:50 dilution, the developer is discarded before exhaustion, and that therefore the development time would be the same regardless of 24/36 exposure film length? On the other hand, I sometimes use stand development at 1:200, and I assume that here, things might be different for 24 exposures vs 36 exposures? Any comments would be greatly appreciated before I develop my first 24 roll!
     
  2. funkpilz

    funkpilz Member

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    The times are exactly the same. I roll my own and I love 24exp rolls because they're short enough to hang over my bathtub. Just thought I'd add that.
     
  3. DutchShooter

    DutchShooter Member

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    I don't change anything for 24 exposure rolls...
    I can imagine it does matter if you have highly diluted developer which is used until exhaustion, that it does matter, but for "regular" developing it shouldn't matter.
     
  4. Sirius Glass

    Sirius Glass Subscriber

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    The development time is the same as for 36 exposures. For the purpose of counting the number of rolls processed with the developer and hypo count it as 2/3 of a roll rather than 1 roll.

    Steve
     
  5. Bigpaul

    Bigpaul Member

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    Thanks for the replies........very useful!