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  1. #1
    Mustafa Umut Sarac's Avatar
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    Powdered Fixer Chemical, rock solid with moisture. Is it usable ?

    My neighbor is a photographer and I ordered 1 kilogram white powder to use as fixer. I think it was something thiosulfate or alike. I never used it and powder turned to rock solid. Is it usable after all ?

    Umut

  2. #2

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    If I remember correctly regular fixers are Sodium Thiosulfate and rapid fixers were Ammonium Thiosulfate. To check for activity, put a clipped piece of film in the fixer and see how quickly it clears.
    Dave

    "She's always out making pictures, She's always out making scenes.
    She's always out the window, When it comes to making Dreams.

    It's all mixed up, It's all mixed up, It's all mixed up."

    From It's All Mixed Up by The Cars

  3. #3

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    Umut, If you try to mix the powder with water, I think that your chances to disolve the powder are excellent. Use water at 20 C.
    Dave

    "She's always out making pictures, She's always out making scenes.
    She's always out the window, When it comes to making Dreams.

    It's all mixed up, It's all mixed up, It's all mixed up."

    From It's All Mixed Up by The Cars

  4. #4

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    The anhydrous forms of both sodium and ammonium thiosulfate will absorb moisture from the air and set like concrete. This is why sodium thiosulfate pentahydrate and ammonium thiosulfate 60% solution are usually sold. They are probably OK just get out a large hammer to break up the chunk.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  5. #5
    Mustafa Umut Sarac's Avatar
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    Thank you Dave and Gerald.

    Dave, I love Cars, no new group like the 80s.



 

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