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Thread: Shelf life of chemicals

  1. #1

    Join Date
    Oct 2010
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    Traverse City, MI
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    Shelf life of chemicals

    I have on my shelf a tub of Hydroquinone and one of Elon from Kodak and another tub of Elon from another mfg. Does anyone have a feel for the shelf life of these chemicals? I recently made D-23 from this group with good results but am curious what someone else's experience has been.

  2. #2

    Join Date
    Sep 2003
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    Massachusetts USA
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    Re: Shelf life of chemicals

    With Elon (also known as Metol) look for discoloration: if it is dark-colored, it has probably oxidized and has lost its strength.

    Ultimately, if the results are good, the results are... good

  3. #3

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    Oct 2010
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    Re: Shelf life of chemicals

    Thanks Ken. A bit more testing is in store and then soup on.

  4. #4
    Bill Kostelec
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    Oct 2013
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    Spokane, Washington
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    Re: Shelf life of chemicals

    I use a Kodak bottle of Elon from the 60's and even though it is a bit brown it makes fine D-23. I have a cardboard can of hydroquinone that is probably at the latest from the 1930's. The crystals are nice and white and I use it regularly to make print developers. I have found with it though that it does better if I double the quantity.

  5. #5

    Join Date
    Feb 2008
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    1,209

    Re: Shelf life of chemicals

    My Elon is in a Kodak brown glass jar, it has a Camera Center price sticker with a 2 letter & 5 digit phone number LA 4-7361.
    I just mixed some PMK developer, I just used up the last batch of concentrate, mixed a year ago.
    Real cameras are measured in inches...
    Not pixels.

    www.photocollective.org

  6. #6

    Join Date
    Oct 2010
    Location
    Traverse City, MI
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    Re: Shelf life of chemicals

    Antique chemicals abound! My containers are plastic and the crystals are whit-ish also. Up on the shelf I also have a few collected cans of developer that I have presumed were shot but maybe not. Thanks for the input.

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