Rewashing negatives with water spots?

Discussion in 'B&W: Film, Paper, Chemistry' started by GarageBoy, May 28, 2013.

  1. GarageBoy

    GarageBoy Member

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    So I have a few negs which I washed improperly and now have water and dust spots all over them
    I've also cut them already
    Can I rewash, use photo flo and hang them by their sprocket holes?
    Thanks
     
  2. MattKing

    MattKing Subscriber

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    Yes, but be careful as the extra handling can lead to scratches.
     
  3. tkamiya

    tkamiya Member

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    I do that all the time!

    I make a "hanger" with paper clips that goes into the sprocket hole. I make a "weight" that goes to the other end of the film out of the same stuff. The short strip will curl badly as it dries, so without a weight, you'll end up with a coil. I wash them by carefully reeling strips into my developing reels, so the imaging surface doesn't touch anything during the re-washing process.
     
  4. ToddB

    ToddB Subscriber

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    Yes.. like everyone said. sqeegee them with your photo-flo fingers, not the rubber ones. Your sure to scatch them with those.
     
  5. cliveh

    cliveh Subscriber

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    It may not be necessary to rewash them if you just have a few water marks. These only tend to form on the shiny side of the film, so lay the strips in turn shiny side up on something clean like a negative page. Then breathe on them as you would to mist up a mirror and then wipe them gently with a lens cleaning cloth. If the spots don't disappear, dab a bit of ethanol on the cloth and wipe again.
     
  6. Michael W

    Michael W Member

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    Soak them in distilled water or something similar like demineralised.
     
  7. hoffy

    hoffy Member

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    The question needs to be asked, are the water spots ACTUALLY causing any visible issues when enlarging? I get drying marks occasionally and find that indeed that they are on the shiny side only. I have also found that quite often, they don't appear to make too much of an issue when put in the enlarger.

    But, as they say, your mileage may vary...
     
  8. GarageBoy

    GarageBoy Member

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    On a... ::cough:: flatbed ::cough::
    I can see the spots as weirdly colored splotches
    This was the first roll of film I processed and I like quite a few of the shots on that roll
     
  9. tkamiya

    tkamiya Member

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    Cough:scanner:cough shows stains, scratches, and water spots far more clearly than an enlarger. I don't know why but it does. I had one like that but printed just fine on my enlarger.

    What I usually do is to soak my film in weak acid (like stop bath) to losen the calcium content of the stain, then soak long time in filtere/distilled water. Then rinse, photoflo, and dry. It usually works.

    I wouldn't scrub it with alcohol as you have a chance of scratching the film. Even if it is on back side of film, it can show. I've done it.
     
  10. Herzeleid

    Herzeleid Member

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    I have recently tried a different rinse formula that I have found in APUG. To prevent future rinsing problems I would recommend that.
    1 oz ilfotol/foto-flo mixed with 7 oz isopropyl alcohol, becomes the stock solution.
    Use it diluted 1+25 or 1+24. It works better than plain foto-flo imo. I used bottled water for final rinse and no problems spotted in cough:scanner:cough.
     
  11. R.Gould

    R.Gould Member

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    If I get water marks on negatives I soak them again in Wetting agent for a minute or so, shake the film and if it 120 I simply hang it up to dry, if it is 35mm I hang it up, take a sheet of kitchen towel folded and wipe the shiny side of the film, turn the folded towel over and wipe the film twice more, never get a drying mark and never get a scratch, whatever you do NEVER, NEVER,EVER WIPE THE EMULSION SIDE of the film with anything, fingers, towel as as sure as eggs are eggs you will get a scratch
    Richard
     
  12. Rudeofus

    Rudeofus Subscriber

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    I was wondering whether a final swap/rinse in very dilute hydrochloric acid would do the trick, it would dissolve all the calcium and leave no residue by itself as it is a gas. Has anyone tried this?
     
  13. cliveh

    cliveh Subscriber

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    De-ionised water as a final rinse for 30 seconds will ensure no drying marks.
     
  14. limnidytis

    limnidytis Member

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    If you have hard water marks washing in stop bath will usually remove them. Then wash as usual. I have hard to very hard water so I always do a final rinse in distilled water after washing. It costs something but it saves me a lot of grief with water marks. I would not try HCl as it might dissolve the hard water stain as well as damaging the gelatine.
     
  15. GarageBoy

    GarageBoy Member

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    Thanks
    Will try with a simple rinse/photoflo+distilled