Sodium Metaborate substute

Discussion in 'B&W: Film, Paper, Chemistry' started by Bruce Osgood, Mar 3, 2012.

  1. Bruce Osgood

    Bruce Osgood Membership Council Council

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    Anybody know of a substute for Sodium Metaborate when making TF-3 fixer? Or where I can get some on a Saturday at 6:30pm in Brooklyn NY?

    Thanks,
     
  2. Photo Engineer

    Photo Engineer Subscriber

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    In a pinch use Boraxo from your grocery store. Don't do it unless it is an emergency.

    Check the pH with pH paper or a meter.

    PE
     
  3. Bruce Osgood

    Bruce Osgood Membership Council Council

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    Thanks Ron,
    I'm just gonna wait till tomorrow and go to B&H. Nothing that can't wait.
     
  4. Neanderman

    Neanderman Member

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    "From a Kodak Formulary publication, 1.4 grams of sodium tetraborate, decahydrate (Borax) + 0.3 gram of sodium hydroxide is equal to
    2 grams of sodium metaborate (Kodalk) in a litre of solution"
     
  5. Rudeofus

    Rudeofus Subscriber

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  6. Bruce Osgood

    Bruce Osgood Membership Council Council

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    Wow, I hadn't realized just how much this has been kicked around. Thanks, (I do miss Gadget.)
     
  7. john_s

    john_s Subscriber

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    Also, for fixer it's not critical anyway. For developer one would have to be accurate.
     
  8. Photo Engineer

    Photo Engineer Subscriber

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    Well, the pH of TF-3, 4 and 5 is critical in some ways.

    PE