Freezing Unicolor C-41 powder chemical kit.

Discussion in 'Color: Film, Paper, and Chemistry' started by Stew, Apr 20, 2010.

  1. Stew

    Stew Member

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    Hi,

    Would freezing a box of these chemicals in their powdered state extend the life of them past the expiry date? Has anyone done this?

    Thanks.
     
  2. Christopher Walrath

    Christopher Walrath Member

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    Freezing could promote condensation and thus ruin the powder from the get-go. It would have to be kept IMMACULATELY dry. Probably not worth the risk, IMHO.
     
  3. thisismyname09

    thisismyname09 Member

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    The powder should keep very well. I don't quite see the purpose for this.
     
  4. Mike Wilde

    Mike Wilde Member

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    Some developing agents oxidize off more slowly when they are dry and frozen. I keep my glycin and ppd developing agents in the freezer in sealed glass bottles. they do not get openned until they are back up to room temp.

    So the move seems reasonable. Make sure that you consider foil sealing if the chems are only packaged in platic packets.
     
  5. brucemuir

    brucemuir Member

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    I actually have one of these Uni C41 kits left too.
    I switched to the Kodak Flexi-color route.

    Wonder how long it will last. I assumed the sealed powder would last awhile also but have had powdered Glycin go bad before so I guess I shouldn't assume :wink: