5% acetic acid for RA-4 stop bath?

Discussion in 'Color: Film, Paper, and Chemistry' started by Stew, Nov 20, 2005.

  1. Stew

    Stew Member

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    Hi,

    Can 5% acetic acid,(vinegar), be used for an RA-4 process stop bath? What is the dilution ratio with water?

    Thanks,
    Rob.
     
  2. Photo Engineer

    Photo Engineer Subscriber

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    Rob use 1% or 2%, not 5%. Much better and does not affect the blix so badly.

    PE
     
  3. Nick Zentena

    Nick Zentena Member

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    1% means 10ml in a litre. 5% is 5ml in every 100ml of vinegar. So use 200ml of vinegar with 800ml of water. Or a ratio of 1:4
     
  4. Boris

    Boris Member

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    I once ran out of acetic acid and used 5% vinegar diluted 1:4. Woks fine.