Temp setting of the Freezer

Discussion in 'B&W: Film, Paper, Chemistry' started by Jedidiah Smith, Jun 29, 2009.

  1. Jedidiah Smith

    Jedidiah Smith Member

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    I just read the recent thread here about old film in the freezer.
    This got me to thinking: All other things being equal, would it matter what setting the freezer was at? I'm just setting up another darkroom, and will have a small freezer for the film/paper in it as well. I've never dedicated a freezer strictly to my darkroom before. It was always in the "wife's freezer" :D

    So...this thing's got setting 1 to 6, i.e. warmest to coldest. It does not have auto-defrost capability - just freeze. :wink: Would it help the longevity of the film if I had it on the coldest setting, or is the difference so minute as not to matter in the long run?

    Thanks,
    Jed
     
  2. PhotoJim

    PhotoJim Member

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    The colder the better, within reason, although colder temperatures mean longer warmup times.

    My chest freezer in the basement is set to -17 C (about 0 F). My refrigerator freezer upstairs is set to about -2 C (28 F).

    I can't comment on how much longer your film will last with a colder freezer, but I know that storage is improved. Kodak (and others) do recommend -17 C-ish for long-term storage, if I remember my readings correctly.
     
  3. PhotoJim

    PhotoJim Member

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  4. bobwysiwyg

    bobwysiwyg Subscriber

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    I'm assuming this is used for food? Isn't the recommended temp. zero degrees F or less?
     
  5. Sirius Glass

    Sirius Glass Subscriber

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    What they said, around 0 F/ -17 C should be good, within reason.

    Of course if you keep it at -40 it does not matter whether it is C or F!

    Steve
     
  6. PhotoJim

    PhotoJim Member

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    Deep/chest freezers, yes, but refrigerator freezers are usually just below freezing. I doubt many can get to -17 C even if you wanted them to.
     
  7. Jedidiah Smith

    Jedidiah Smith Member

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    Thanks guys, especially Jim for looking up the numbers for me. This is a small freezer, but it's the "deep freeze" type, where it is a standalone freezer, no refrigerator part. It seems to get pretty cold, I have it on the middle setting right now as a test, but I might get a thermometer and play with the 1 - 6 settings and see what she can crank to. :smile:
    I was more curious if the temp made any long term difference, or if there was a standard temp. from the film manufacturers to use.
    Jed
     
  8. clayne

    clayne Member

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    As cold as you can get it - which in your case means "6".

    I use this one and set the temperature control to coldest.
     
  9. bobwysiwyg

    bobwysiwyg Subscriber

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    I guess I have to disagree. The zero degree (F) is for food safety reasons. Our freezer (top of fridge) maintains it nicely.
     
  10. jim appleyard

    jim appleyard Member

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    Jed, it's too bad you're no longer in Alaska, you could have just thrown the film outside! :smile:
     
  11. E76

    E76 Member

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    I keep my freezer set at the "recommended setting" (3), and it maintains the temperature at -10 degrees F!
     
  12. Martin Aislabie

    Martin Aislabie Subscriber

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    Guys, there is nothing "magical" about 0 degrees F

    It’s just a nice round number that is easy to remember

    It doesn’t sound as good in metric at -17.8C

    The colder it is, the more slowly emulsion deteriorates

    Martin