Vinegar dilutions

Discussion in 'Black and White' started by nuno_campos|1, Sep 15, 2006.

  1. Hi,

    After some reading here I decided to use white wine vinegar as stop bath. My
    father has a grocery, so it will cost me nothing.

    The question I have is about the dilution of the vinegar. Normally it has 6%
    acidity, but the working solution must have 1,5% or 2%? That means a 1:3 or
    1:2 dilution, right?

    Other thing, should I use the same dilution for film and paper?
    And how many 35mm films and sheets of paper (8x10) can I work with one working
    solution before it looses is strength? Or is it better to use it has one-shoot
    only?

    Thanks in advance.

    Best regards,

    Nuno Campos.
     
  2. Why not use plain water as a stop bath for films and prints? I use Formulary TF-4 Fixer for both film and prints which requires a water stop bath before placing in the fixer. You will need to change the water when it starts to show a slight color - this will depend on how larger your trays are. Cheaper and no need to worry about mixing vinegar or stop bath and smell. Good luck.
     
  3. I've used white (distilled) vinegar as stop bath and, yes, your dilutions are correct based on 6 percent acidity. I also bought 5 gms of bromocresol purple dye to make indicating stop-bath - a tiny amount of the dye is sufficient.
     
  4. I *never* managed to use up a bottle of the official "indicater" stuff, the dilutions are known, and it doens't cost much. As others have said, you can even use water. But if you want a stop bath, I'd say use the photograhic grade.
     
  5. I use a water stop for film and paper, but in my final film rinse I use about a Tbsp. of white vinegar.

    Someone on this board suggested that----very clean negs---thank you very large(whoever)
     
  6. hi,
    the ratio i was given by an old timer was 1:50. it takes about 20 - 30 secs to cut the alkalinity of the developer down.

    hope this helps.
     
  7. i use 1+9 dilution. WHen i was starting out with my darkroom, this norwegian guy told me that one.

    For 1 Liter of stop(paper only)
    100ml white clear vinegar
    900ml cold water

    i have never used it on film though

    Leon
     

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