quetion

Discussion in 'B&W: Film, Paper, Chemistry' started by reikijjb, Nov 21, 2012.

  1. reikijjb

    reikijjb Member

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    Can I add potassium alum to an alkaline film fixer I make up and essentially not change it's alkaline nature? I am trying to avoid scratching negatives. I do not use acid anything in my chemistry. Thanking you in advance.
     
  2. Alessandro Serrao

    Alessandro Serrao Member

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    If I recall correctly, potassium alum needs an acidic environment to work properly...
     
  3. Photo Engineer

    Photo Engineer Subscriber

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    You cannot add Potassium Alum to an alkaline fix. It will form a white precipitate which will ruin the fixer in most cases.

    PE