Why Some Paper Makers Do Not Print Expiration Date?

Discussion in 'Color: Film, Paper, and Chemistry' started by RedSun, Nov 11, 2012.

  1. RedSun

    RedSun Member

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    Well, some of the old Kodak and most of the Fuji, even Ilford, do not have expiration dates on packaging of their papers. How do you know they are new or old?
     
  2. brianmquinn

    brianmquinn Member

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    There are date codes on all papers.
    If you give us an idea of what paper and the code on the package we may be able to help with how old the paper is.
     
  3. wogster

    wogster Member

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    Most paper is very slow something in the neighbourhood of ISO <5 so while film can expire in 2-3 years, for paper it's more then 10 years. If you went into the store and saw paper that expires in 2025, you would probably not believe it's correct. Most companies put an emulsion number on the box which includes a date code, if you call the companies customer service line or email them and give them the emulsion number, they can tell you, if it's old paper. Other hints, they usually update labels once in a while, so if you see an old style label, it's probably old paper. What I did, back when I had my DR up and running, I would buy a 100 sheet box of paper, split it into 25 sheet packages, one would go in the paper safe, the rest were put in light proof bags, then wrapped in foil, that was put in a plastic bag with a label, and dropped into the freezer. That was 1982 - I bet if I had one of those packages now, it would still be good.
     
  4. werra

    werra Subscriber

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    Not pretending to the absolute truth but from my limited experience with expired paper I avoid buying expired variable contrast papers. Fixed-grade papers (Ilfospeed, Brovira) hold up pretty well and are generally usable, variable grade is much worse.
    Ilfospeed for example just goes a bit yellowish with the age, without fog. Which is much more acceptable for than Kodak Polymax of the same age which develops nasty uneven blotches. No fog, just develops unevenly no matter what. Agfa MCP goes just bad with even base fog.
    Probably it has something to do with developing agents included in the emulsion.
     
  5. NB23

    NB23 Member

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    I agree with Werra. Ilfospeed just doesn't go bad. Agfa papers fog as soon as the expiry date is on. Kodak has uneven blotches.
     
  6. frotog

    frotog Member

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    It depends on whether your talking about fiber, b/w rc or color. Color is the most sensitive to change - unrefrigerated ra4 starts to show change in dmin and subtle shift in highlights in as little as 6-10 months. All kodak ra-4 paper has expiry dates printed right on the label. Fuji uses date codes.

    Non developer incorporated b/w fiber and azo tend to age very well, showing little to no change after decades.
     
  7. RedSun

    RedSun Member

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    How do the Fuji date codes work?
     
  8. RedSun

    RedSun Member

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    Can some kind fellows tell me the dates of the Fuji color papers below:

    Type P III em no. 548-013 Matte 2068 07426153 or 2205050329 (inside)
    Super Type C em no. 139-012 Matte 0043 07586213
    Super Type C em. no. 152-015 07591154

    Thanks.