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Thread: What happened?!? White base paper...became warm/yellow base paper!

  1. #11

    Join Date
    Feb 2008
    Posts
    1,207

    Re: What happened?!? White base paper...became warm/yellow base paper!

    Due to more chemical carry over, Fiber base paper tends to exhaust stop bath and fixer faster.,
    Also, try constant agitation in the fixer.
    Real cameras are measured in inches...
    Not pixels.

    www.photocollective.org

  2. #12

    Join Date
    Mar 2018
    Posts
    8

    Re: What happened?!? White base paper...became warm/yellow base paper!

    I already mixed new stop bath and fixer with destiled water and now they came out fine.

    I guess it was the fixer. I never thought because it was relatively new.

    Thanks for all the help!

  3. #13

    Join Date
    Sep 1998
    Location
    Oregon and Austria
    Posts
    2,081

    Re: What happened?!? White base paper...became warm/yellow base paper!

    Quote Originally Posted by Goncalo View Post
    I already mixed new stop bath and fixer with distilled water and now they came out fine.

    I guess it was the fixer. I never thought because it was relatively new.

    Thanks for all the help!
    Two things to keep in mind for the future: Fixer (especially mixed working solutions) has a shelf life. Look at the manufacturer's tech sheet for details, but generally, fixer in an open tray won't last longer than a week, even if you've fixed nothing in it. Working-strength fixer in a bottle only lasts a few weeks at most.

    And, note the throughput capacity for the fixer and type of paper you are using. Capacity for fiber-base paper is less than for RC (and the fixing times are longer as well).

    Do re-fix any prints from your last batch through the bad fixer that you want to keep for a long time. Even prints before the yellowing started are likely underfixed.

    If you work a lot with fiber-base paper, you may want to adopt a two-bath fixing regime. It's more economical and ensures that prints are adequately fixed at the same time.

    Best,

    Doremus

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