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Thread: Storing PMK in refrigerator

  1. #1

    Storing PMK in refrigerator

    I have just started using PMK in premixed bottles of solution A and B from Photo Formulary. Shelf life is supposed to be indefinate.

    I usually store premixed chemicals in a refrigerator. Anyone do this with PMK? I don't know why I am hesitating, other than PMK is new to me.

  2. #2

    Join Date
    May 2004
    Posts
    115

    Storing PMK in refrigerator

    I used to store liquid chemicals in the fridge but i dont anymore. Reason being remembering that gasses disolve more in liquids as the temperature drops. Since chemicals exhaust in contact with air, putting in the fridge would only make things worse.

    I store them in the basement where its cool.

  3. #3

    Join Date
    Sep 2003
    Posts
    217

    Storing PMK in refrigerator

    Ilford give the storage life of their stock strength developers based on storage at between 4 & 20 degrees C (or 5-20 depending on developer) which suggests that a domestic refrigerator is OK for Ilford developers at least. To what extent the extra absorption is offset by the reduced chemical activity at lower temperatures would need testing for each developer and container (a fully airtight bottle would not absorb more air as the contents cooled in any case, but as we know, not all plastics are impermeable to oxygen).

    Cheers,

  4. #4
    Eric Woodbury
    Join Date
    Dec 2003
    Posts
    1,449

    Storing PMK in refrigerator

    I store them in the darkroom which is hot in the summer and cold in the winter. Never had a problem in 10 years. If you put it in the fridge, don't put it next to the icewater. Bad things might develop.
    my picture blog
    ejwoodbury.blogspot.com

  5. #5
    Whatever David A. Goldfarb's Avatar
    Join Date
    Mar 2000
    Location
    Honolulu, Hawai'i
    Posts
    4,658

    Storing PMK in refrigerator

    The stock solutions are very long lasting at room temperature. Gordon Hutchings even recommended aging part A at one time. I don't know if he still does. Save the fridge space for film.

  6. #6

    Join Date
    Jan 2001
    Posts
    4,588

    Storing PMK in refrigerator

    NEVER put anything potentially poisonous in the 'fridge! NEVER!
    Wilhelm (Sarasota)

  7. #7

    Join Date
    Mar 2002
    Location
    Sweet, ID
    Posts
    517

    Storing PMK in refrigerator

    Save the fridge space for beer...
    The only trouble with doin' nothing is you can't tell when you get caught up

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