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Thread: How long can I keep film developer

  1. #1

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    May 2019
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    How long can I keep film developer

    Last Sunday I prepared 1 liter of DD-X but for some reason I did not start to develop my film. I have saved it in a closed brown bottle.

    Can I still use it after one week, or do I just make a new batch ?

    Thanks
    Patrick

  2. #2

    Join Date
    Dec 2014
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    Suwanee, GA
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    Re: How long can I keep film deveopper

    Per Ilford - ILFOTEC DD-X is supplied as a liquid concentrate for one-shot use. Should be diluted 1+4 with water before use. ILFOTEC DD-X working strength solutions should not be kept for more than 24 hours.

    So is your mix 1-4 diluted or the concentrate?
    Adventure is worthwhile in itself. ... Never interrupt someone doing what you said couldn't be done. -- Amelia Earhart
    http://www.searing.photography

  3. #3
    Tin Can's Avatar
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    Dec 2011
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    16,629

    Re: How long can I keep film deveopper

    For years I have been using Rodinol which is 'One shot', it must be mixed and used shortly

    My favorite dilution is 10 ml to 1000m; distilled water per 80 sq inches of film

    I vary strength and times, but always at 70F

    and I never say it is 10ml and 990 ml
    2022

  4. #4

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    Re: How long can I keep film deveopper

    It’s the 1-4 diluted one, so I’ll throw it away :-(

  5. #5

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    Re: How long can I keep film developer

    You can mix it just before use rather than ahead of time so you don't waste it. For the Pyrocat M I use, I get the water to temperature, and then add the parts A and B just before it goes in the tank. You can mix while presoaking your film.
    Adventure is worthwhile in itself. ... Never interrupt someone doing what you said couldn't be done. -- Amelia Earhart
    http://www.searing.photography

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