Phenosafranine

Discussion in 'B&W: Film, Paper, Chemistry' started by bogeyes, Nov 12, 2005.

  1. bogeyes

    bogeyes Member

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    Found an old film developer formula with Phenosafranine in it. Can anyone tell me if phenosafranine is an old name for phenidone perhaps? No, then what is it and whats it used for?

    Solution A
    water @ 125f 350ml
    hydroquinone 32g
    sodium sulphite anhydrous 25g
    phenosafranine 1 : 1000 solution 5ml
    potassium bromide 0.5g
    cold water to make 500ml

    solution B
    cold water 350ml
    potassium hydroxide 50g
    sodium sulphite anhydrous 25g
    potassium bromide 0.5g
    cold water to make 500ml
     
  2. Mateo

    Mateo Subscriber

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    Nope, it's not phenidone, it's a desensitizing dye I think. The sort you would use to make it so that you can develop your film by inspection.
     
  3. Jordan

    Jordan Member

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    Yup, it's a sensitizing dye. Just checked it in the Merck Index.
     
  4. df cardwell

    df cardwell Subscriber

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    Phenosafranine is about the last readily available desensitizer on the market. A VERY good ready made desenitizer is available from ANTEC, Inc ( Louisville, Ky ).

    http://www.kyantec.com/photographic.htm

    Phenosafranine is (was) used both as a developer additive ( works in many but not all developers ) or as a forebath. Your formulae is adding it to the developer, for inspection.

    .