Fixer shelf-life

Discussion in 'The Darkroom' started by jameswilgeroth, Mar 28, 2010.

  1. jameswilgeroth

    jameswilgeroth TPF Noob!

    Joined:
    May 18, 2009
    Messages:
    6
    Likes Received:
    0
    Can others edit my Photos:
    Photos NOT OK to edit
    Developers tell you how long they last, stop baths come with indicator which tells you when they are bad, but fixers are a bit different.

    Is there a general rule of thumb for how long a fixer will last once open (say 1 ltr bottle)?

    Also....
    How long will unopened fixer remain good?

    I understand that a clearing test might solve all of the answers above, but a little built-in knowledge is always useful.

    Anybody have any trade secrets or tips?



    Thanks
     
  2. Early

    Early TPF Noob!

    Joined:
    Feb 8, 2008
    Messages:
    1,240
    Likes Received:
    0
    Location:
    Western NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    I don't know the shelf life of fixer, but I always dumped mine regardless when the sulfur, or whatever it was, dropped out. You can test it, though. to see how long it takes to clear a strip of film.
     
  3. Hamtastic

    Hamtastic TPF Noob!

    Joined:
    Mar 9, 2010
    Messages:
    87
    Likes Received:
    0
    Location:
    USA
    Can others edit my Photos:
    Photos NOT OK to edit
    Depends how much air and how long it's exposed. Depends on how well your stop bath is working. The more developer in the fixer the sooner it goes. I would consult the tech pub from the manufacturer for recommended capacity.

    A clearing test works. A bottle of hypo check is cheap and reliable, and lasts a long time (you only use a drop or two at a time).

    Edwal | Hypo Check (Liquid) - 3/4 Oz. | EDHC3/4 | B&H Photo Video
     
  4. chris

    chris TPF Noob!

    Joined:
    Jun 20, 2003
    Messages:
    271
    Likes Received:
    22
    Location:
    Scotland
    When the fix is first made up cut a small piece of film, drop it in the fix and note the time to clear.
    Do this each time the fix is used and when the clearing time has doubled it has reached the end of its useful life.
    If you are getting a black precipitate in the fix then it should be discarded. The precipitate is silver, not sulphur. The silver dissolved in the fix can be recovered but you need to be processing huge quantities of film to make this worthwhile. When I was an industrial radiographer we used to sell the spent fix to a recovery company. We would typically be processing 100 to 200 4" x 14" films per day and would save the spent fix over a two month period to accummulate enough to make it worth collecting and processing.
     
  5. jms12886

    jms12886 TPF Noob!

    Joined:
    Apr 8, 2010
    Messages:
    12
    Likes Received:
    2
    Location:
    Rhode Island
    Can others edit my Photos:
    Photos OK to edit
    :)
     
    Last edited: Mar 27, 2012

Share This Page

Search tags for this page
bad film fixer
,

fixer shelf life

,
how long does a fixer last in a dark bottle?
,
how long does fixer last
,
how long does photo fixer last
,
how long is fixer good for
,
how long will fixer last
,
how long will unopened photo developer last
,
shelf life fixer
,
what is the shelf life of fixer