how can i tell if fixer is still good

Discussion in 'The Darkroom' started by Jeff Canes, Jun 1, 2006.

  1. Jeff Canes

    Jeff Canes No longer a newbie, moving up!

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    how can i tell if fixer is still good, I have about 3/4 of gallon in the brown jug, it likely 6 months old
     
  2. JamesD

    JamesD Between darkrooms

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    If it's for film, drop a bit of film leader in it. Measure how long it takes for the film to clear. If it clears, fix for twice that long. If it doesn't, throw it out.

    For paper? I dunno. Same thing, I guess, except that dilutions and fixing times are different for paper.
     
  3. Jeff Canes

    Jeff Canes No longer a newbie, moving up!

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    Thasks James, did the test you subjected, the film cleared within a minute or two, I usual fix for 7-10 minutes, seem like it will be fine, agree the same film test would work with paper tray working solution
     
  4. motcon

    motcon TPF Noob!

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    are you using tmax? if so, those times seem fine. if you are using a film other than tmax, be careful of over fixing.

    if it clears the film, it'll be fine for paper.
     
  5. mysteryscribe

    mysteryscribe TPF Noob!

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    do they still make hypo check???
     
  6. JamesD

    JamesD Between darkrooms

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    Yes, they do, but we're cheap. Plus, how do you check the hypo check?
     
  7. Philip Weir

    Philip Weir TPF Noob!

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    This may sound like a funny answer to your question, but I used to check it by rubbing it between my fingers. Compare the feeling with fresh hypo check [we call it Hypo clearing agent over here]:confused:
     
  8. Philip Weir

    Philip Weir TPF Noob!

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    Same principle applies, photographic paper is yellowy prior to fixing, get an unused piece and in the light, stick the end in the fix. When the yellow clears out,[quote, "fix for twice as long"] ;)
     
  9. JamesD

    JamesD Between darkrooms

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    My paper is white, same before and after fixing.
     
  10. Rolleistef

    Rolleistef TPF Noob!

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    all right then.
    Now comes the long-lasting check : if after 1 month the picture is getting red/purple, then the fixer was not good.
    If your fixer was properly stored (no air, no light) then you can keep it for quite a long time
    have fun
    St├ęphane
     

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