Fixing Film v Fixing Paper

Discussion in 'B&W: Film, Paper, Chemistry' started by Martin Aislabie, Jan 17, 2011.

  1. Martin Aislabie

    Martin Aislabie Subscriber

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    I have a question, which struck me yesterday as I printed.

    When you Film, in the early stages of fixing the emulsion takes on a milky appearance before clearing

    When you fix Paper, I have never seen the paper emulsion take on a milky appearance

    Anyone know why this is the case :confused:

    Thanks

    Martin
     
  2. Bob-D659

    Bob-D659 Member

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    White paper backing and also a lot less silver, esp on rc paper.
     
  3. George Collier

    George Collier Member

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    What Bob said, also, some papers do exhibit a change while fixing, if you watch closely. I have used some which "cleared" noticeably in the past (an Eastern Euro paper, don't remember the brand, was the most obvious), and I could see somewhat a change as my old favorite, Forte MG Fiber cleared in TF4. Ilford MG doesn't show a change, that I can see under red lights.
    I haven't compared closely, but I think the Ilford MG does look slightly cleaner, though, under white viewing light, if soaked in water for a minute or so after fixer, rather than taken straight from the fixer to viewing, as if final remains are cleared out by the water.
     
  4. Ian Grant

    Ian Grant Subscriber

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    If you'd used Kentint or the Tura B&W papers which were on on a coloured/metallic bases then you'd have seen clearly that all emulsions have that milky look, it's the undeveloped silver halides.

    Ian
     
  5. ic-racer

    ic-racer Member

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    Papers do show this. It seems like lithable papers show it more; it is something that you have to account for when doing lith printing. That is, you can see the image change in the fixer, and it may, or may not, be what you wanted when you snatched the print from the developer.
     
  6. ic-racer

    ic-racer Member

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    Papers do show this. It seems like lithable papers show it more; it is something that you have to account for when doing lith printing. That is, you can see the image change in the fixer, and it may, or may not, be what you wanted when you snatched the print from the developer.
     
  7. Martin Aislabie

    Martin Aislabie Subscriber

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    I had forgotten about those Kentmere papers with a coloured base :smile:

    They did a silver base and others but cannot remember what they were

    One of my freinds at Uni was quite "into" them

    Seems a long time ago

    Martin