Correction: Help - film drying dust

Discussion in 'Darkroom Developing and Printing' started by zmweber, Jul 15, 2003.

  1. zmweber

    zmweber Guest

    I hang my 35mm & 2 1/4 negs to dry in my small bathroom, with the door
    closed. I am plagued by dust marks that show up on 8x10 and 11x14
    prints.
    Does anyone have a remedy (short of spotting) for this?
    Has anyone tried spraying the room with a fine water mist before
    hanging? Would the room dust be carried by the droplets as they sank
    to the floor?
    Any help would be appreciated.
    To reply by email, please delete the leading "z".
    Thank you.


    -
    To reply by email, please delete the leading "z".
    Thank you.
     
    zmweber, Jul 15, 2003
    #1
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  2. zmweber

    Rich Shepard Guest

    I used to get the occasional dust while hanging to dry on both 120 roll
    film and 2.25x3.25" sheet film. Then I built a drying cabinet from 1"x8"
    lumber. There's a 50 cfm fan on the bottom pulling air out, a piece of 1"
    open-cell foam on the top as a filter and weatherstripping on the door edges
    so airflow is in on the top and out the bottom. I've had no dust on
    negatives since I started using my box.

    Rich
     
    Rich Shepard, Jul 16, 2003
    #2
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  3. Claudio Bonavolta, Jul 16, 2003
    #3
  4. Around 20 to 30 minutes before hanging the film out, carefully wet the
    walls and the floor of the bath with tap water, and then close de
    door/s and eventually the window/s of the bathroom. You will create an
    ambient satrurated of humidity wich "capture" the dust. When processed
    the film, inmmerse it in Photo-flo (1:400 filtered water) and proceed
    as usual. Hang the film out in the bathroom. You will get no dust at
    all from the air. But you may get dust and other particles from
    another source i.e. the processing water and the photochemicals
    itself. If so, you need to use over the wet film the same procedure I
    am making, using a WET, clean dust brush as used in dusting the photo
    lenses. Start from top and go to bottom of the hanging film, front
    (emulsion side) and rear. With the aid of the dust brush all the
    particles will go down to the floor with the water itself. And no
    scratches at all. Regards. Eduardo Benavidez
     
    Eduardo Benavidez, Jul 16, 2003
    #4
  5. zmweber

    Some Dude Guest

    In case you missed my previous recommendation in another thread:

    Sharper Image Ionic Breeze "Desktop" model. (Providing you can afford
    it). Fits in the smallest of darkrooms.


    Cheers,
    -sd
    http://www.zoom.sh
     
    Some Dude, Jul 17, 2003
    #5
  6. zmweber

    Rich Shepard Guest

    I have an ion generator I bought on eBay for much less than $250. :) It
    does work. I also have a couple of gadgets for deionizing electronic work
    spaces, but I'm not sure what they offer other than cool or warm breezes.

    Rich
     
    Rich Shepard, Jul 18, 2003
    #6
  7. zmweber

    nick Guest

    I have a small, 8" deep cabinet with nothing else for drying. the
    environment is quite dusty. Prior to that, I used the bathroom. Going
    back 30 years never, repeat never a dust spot on a negative. Following
    wash 1 minute in standard dilution Photoflo then squeegee and hang.
    Once a scratch from some grit on the squeegee, now I use ny index and
    middle fingers. As good is one of the many formulas where a little
    isopropyl (rubbing)alcohol added to the photoflo and no squeegee. Most
    of the brands on the market contain nothing else, but good idea to
    read the label as there appear to be some that have chemicals you
    wouldn't want. All I ever see in my local stores is the pure stuff.
    you should not need anything fancier.

    Good luck

    Nick
     
    nick, Jul 18, 2003
    #7
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