Stop Bath -- Too Strong?

Discussion in 'B&W: Film, Paper, Chemistry' started by bvy, Apr 28, 2013.

  1. bvy

    bvy Subscriber

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    I goofed. I mixed up a new batch of Kodak Indicator stop bath today, and must have pulled the dilution off of the wrong line of instructions (for X-ray film or some such). So instead of 8ml of concentrate, I mixed 20ml of concentrate for 500ml of working solution. The film looks okay (I haven't scanned or printed yet), but I'm wondering if I've done any hidden or long-term damage.

    Thanks.
     
  2. HTF III

    HTF III Restricted Access

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    no. Just cut your stopbath appropriately with water for next time
     
  3. Doremus Scudder

    Doremus Scudder Member

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    The possible ill-effects of too-strong stop are pinholes in the emulsion caused by gas being released from the acid-base reaction. If you have these, you should be able to see them with a loupe. This would only really happen with very alkaline developers and rather soft emulsions, so you are likely alright. Do dilute your stop to the proper dilution before using it again.

    Best,

    Doremus


    www.DoremusScudder.com
     
  4. bvy

    bvy Subscriber

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    Thanks. This was Tri-X 400 (120) in D76 1:1, by the way.