Pyrocat-HD glycol shelf life?

Discussion in 'B&W: Film, Paper, Chemistry' started by malinmalin, Oct 14, 2007.

  1. malinmalin

    malinmalin Member

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    Hello,

    I was doing some cleaning yesterday and found some Pyrocat-HD in glycol
    that I apparantly bought ~1 year ago from Photographic Formulary. The bottle has buckled inside a bit and it has never been opened.
    Searching in the archives I see that with glycol the shelf-life of Pyrocat-HD in much more extended compared with the water based one.
    Anyone has data points on this?

    thanks!
    jf
     
  2. dslater

    dslater Member

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  3. malinmalin

    malinmalin Member

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    Ah! I guess I missed that one!
    Thanks for the info.

    Cheers,
    jf
     
  4. dslater

    dslater Member

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    Yes - well one of the problems with computer searches is you have to know the right keyword to search for. From the title of the thread, it isn't obvious that it's about shelf life.
     
  5. Tom Hoskinson

    Tom Hoskinson Member

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    My experience supports a shelf life in years for the Pyrocat A solutions mixed in glycol.
     
  6. mikebarger

    mikebarger Subscriber

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    So far I haven't been able to make any developer last more than a year glycol or not.

    The bottle always get used up first :wink:

    Mike
     
  7. Tom Hoskinson

    Tom Hoskinson Member

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    Mike, The last time I mixed (2005) some Pyrocat Stock A in Glycol was in 2005. I mixed 2 liters of Pyrocat P and 2 liters of Pyrocat - MC. I'm still working on the first liter of both.

    I also have about a half liter of Pyrocat-HD/Glycol Stock A left that I mixed in 2004.