Bad PH

Discussion in 'B&W: Film, Paper, Chemistry' started by mrred, Mar 10, 2013.

  1. mrred

    mrred Subscriber

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    I was making some mytol and I over compensated with Sodium metaborate, resulting in a PH of 8.5. The stuff works, but is too active. What could I use to bring down the PH to what it suppost to be?
     
  2. mts

    mts Subscriber

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    adjust pH with 5-10% sulfuric acid; for slight changes use 10% acetic.
     
  3. albada

    albada Member

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    Citric acid also would work well. I've used it in home-brew developers, so I've verified that it doesn't mess up the brew.

    Mark Overton
     
  4. mrred

    mrred Subscriber

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    I've got some %2 sulf acid mixed up for my reversal process. I'm not that far off as the PH is 8.5. That should do the trick.
     
  5. Rudeofus

    Rudeofus Subscriber

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    Since you don't want to dilute your brew you want to use the most concentrated acid you can find. For this reason I would support Mark's suggestion of Citric Acid, followed by NaHSO4 and concentrated other acids like Acetic, Sulfuric or whatever.
     
  6. mrred

    mrred Subscriber

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    Thank you gents, my 2% sul acid worked like a charm. The negs are hanging to dry now and look good.