PMK Part A turned to maple syrup color

Discussion in 'Darkroom Equipment' started by BBarlow690, Mar 4, 2005.

  1. BBarlow690

    BBarlow690 Member

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    My bottle of PMK Part A has turned dark brown - similar to maple syrup (Dark Amber B-grade, as we'd call it in New Hampshire).

    Is it dead, or will it still perform?
     
  2. c6h6o3

    c6h6o3 Member

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    I've used PMK for as long as two years after mixing it (stored in amber glass jars) with acceptable results. I think the statement that it will keep for up to ten years a trifle fanciful, but it will certainly keep a long time.

    When did you mix it?
     
  3. jimgalli

    jimgalli Subscriber

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    Sounds like it may have been inadvertantly contaminated with a tiny specimen of the B solution and the color your seeing is the resultant oxidation. Takes very little for this to happen, like mixing up the caps ie. B cap on A solution or sticking the A syringe into the B soluion and then back into the A.
     
  4. BBarlow690

    BBarlow690 Member

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    Got it premixed from Photog's Formulary about a year ago.

    I can't see any way that I could have contaminated it.

    The question remains: is it still good?
     
  5. Bob Carnie

    Bob Carnie Subscriber

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    I think the only answer to your question it to expose some film and try it.
     
  6. Robert Brummitt

    Robert Brummitt Member

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    It's still good. Pyro turns color when exposed to light. Thats why it should be kept in dark bottles. I've got PMK thats been with me for 4 years (handed down to me from photographers who went Digital) and it still works.
    But if you feel that it got contaminated then try a roll to see.