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Thread: Pyrocat HD in Glycol Shelf life

  1. #1

    Pyrocat HD in Glycol Shelf life

    Good afternoon. I am just getting my darkroom up and running again. I have unopened Pyrocat HD in glycol from 2015. Is it reasonable for this solution to work at full strength when it is 2.5 to 3 yrs old?

    Thank you

  2. #2
    Pastafarian supremo Rick A's Avatar
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    Re: Pyrocat HD in Glycol Shelf life

    Should be 100% if it's in sealed bottles.
    Rick Allen

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  3. #3

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    Re: Pyrocat HD in Glycol Shelf life

    Having read that it can "die" rather suddenly, is there any way to tell other than finding under-exposed negs at your normal processing parameters?

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    Re: Pyrocat HD in Glycol Shelf life

    On smaller formats a clip test in room lighting is done often to see how fully it develops in the test soup, but it's very cheap in that format...

  5. #5

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    Re: Pyrocat HD in Glycol Shelf life

    Peter,

    It can die suddenly; had it happen once over all the years I've used it. I look for the color change when mixing. If I don't see the color change to a faint copper color after adding B, I stop and mix up a fresh batch.

  6. #6

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    Re: Pyrocat HD in Glycol Shelf life

    I have a batch bought last December that appears to be getting more active and creating denser negatives from what I was getting earlier in the year. Has anyone else had this issue.
    There is no cross contamination of A and B - separate caps are labeled as are the separate syringes. My garage storage area fluctuates from 40-80 degrees so it could be at fault.
    I may order smaller containers next time and keep some indoors.
    The magic you are looking for is in the work you are avoiding.
    http://www.searing.photography

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