Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,943   Posts: 1,557,691   Online: 1192
      
Page 3 of 3 FirstFirst 123
Results 21 to 24 of 24
  1. #21

    Join Date
    Mar 2004
    Location
    Southern California
    Shooter
    Multi Format
    Posts
    3,879
    Images
    11
    Quote Originally Posted by WarEaglemtn
    Thanks for the correction on Mysteries of the Vortex. My memory isn't what it oughta be.

    On the Hypo Eliminator. Will there be any shortened print life or greater susceptibility to aerial pollutants if the print is fully toned after using it compared to Hypo Clearing agent and full toning?

    If one uses Kodak selenium toner and then HCA, will there be a difference in reaction to the airborne pollutants? Any studies on it that can be summarized for us laymen to understand?
    Check out my earlier post and go to:

    http://www.photokb.com/Uwe/Forum.as...-Toner-Archival

    There is a good list of literature references there on the subjects you are interested in.

    I believe that the current recommendation for archiival washing is that HCE (Hypo Eliminator) is not needed if you use HCA (Hypo Clearing Agent) followed by a reasonable water wash and toning.

    If you choose to use HCE, the recommendation is to follow the HCE with an HCA soak, a water wash and toning.
    Tom Hoskinson
    ______________________________

    Everything is analog - even digital :D

  2. #22

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    Quote Originally Posted by WarEaglemtn
    Thanks for the correction on Mysteries of the Vortex.

    On the Hypo Eliminator. ...

    If one uses Kodak selenium toner and then HCA, ...
    In that article, Mysteries ... , the very scary performance of a big
    brand archival washer is pictured.

    The Image Permanance Institute, IPI, whose main concern is
    microfilm, has suggested the total removal of all fixer and then
    treatment with a measured amount of sulfide. Sulfide at solution
    strength of 1 part per 10,000 has been found to be completly
    effective for archival results.

    HCA after selenium toner? I've not seen any studies. I don't
    suppose it would hurt. Follow with a wash.

  3. #23
    jd callow's Avatar
    Join Date
    Jan 2003
    Location
    Milan
    Shooter
    Multi Format
    Posts
    8,002
    Images
    117
    A friend of mine who was getting his Phd in Microbial biology (prior to doing 7-15 in a men's club nestled away in the Michigan country side) told me that washing was less efficient*, although faster, than soaking and changing the water.

    The fully saturated paper will become equalized with the water. It is at this point that the water should be changed and the paper left to soak until the two have reached equalization and then the process repeated.

    *Efficiency being measured by the amount of energy and water used to achieve a thoroughly clean print.

    *

  4. #24

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    I would'nt trust to an archival washer. If I had one I'd do as some do;
    fuss with the prints, shake the bubbles off, keep the water running,
    then cross my fingers. I'm quite sure they are more trouble than
    they are worth.

    I use a still water diffusion method. I process one tray but when
    washing I use two. An interleaving method is used. Prints alternate
    with very porous hydrophobic sheets. Be sure a sheet is placed at
    bottom and at top of stack.

    A little fussing is needed as the stack is built. For an 8 x 10 use
    250 ml water at bottom then a sheet then a print, and last
    another 250 ml H2O.

    After the fix give a rinse, hca, and rinse then build a holding
    stack as prints become ready. Or you may wish to hold at the
    hca. They will be moved to the first wash when you are ready.
    I've had zero stain with 3 washes. For a uniform wash do not
    mess with the prints once they have been settled in.

    I've very hard well water and use only distilled. I do my hikeing
    in the Cascades of Oregon's Northwest. Dan

Page 3 of 3 FirstFirst 123


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin