Ammonium Persulphate bleach not working

Discussion in 'B&W: Film, Paper, Chemistry' started by thefizz, Apr 3, 2014.

  1. thefizz

    thefizz Member

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    Its been a few years since I used this bleach so maybe I have made a mistake with my formula. I recently tried bleaching a few prints but nothing happened.

    Ammonium Persulphate 25g
    Sodium Chloride 1% solution 25ml
    Sulphuric Acid 1% solution 30ml
    Water to make 1L

    Have I forgotten something?

    Peter
     
  2. eclarke

    eclarke Member

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    I have my formula on an index card at home, will check it tonight..
     
  3. thefizz

    thefizz Member

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    Just realised I posted this in the colour forum by mistake. Maybe a moderator can move it to the B&W section.