Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,713   Posts: 1,514,719   Online: 837
      
Page 3 of 3 FirstFirst 123
Results 21 to 29 of 29
  1. #21

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    Quote Originally Posted by MurrayMinchin View Post
    It did work in 2005 when this thread started...me-thinks Kachel
    is hibernating, or at least not seeking public attention at this time.
    I don't know of any other sources for his writing on SLIMT. Murray
    I've just tried finding his 'front door' with no success.
    Within the last year it was on line. His article goes on
    and on and on.

    The article at www.unblinkingeye.com pretty well covers
    the subject. Essentially it is a straight forward very simple
    to execute process. I referred to it as a chemical burning in
    at a previous post. The OP of that thread needed to burn in
    some areas while maintaining good middle and shadow
    area detail.

    The post exposure pre-developer soak in an extremely dilute
    potassium ferricyanide one-shot solution in effect reduces
    exposure in areas of the print which otherwise would be
    a mass of black. So the highlights are burned in at
    at exposure. No additional burning in needed.

    I know, some are thinking it is a chemical dodging because
    the dense areas most reduced. Of course that is where latent
    image bleaching depends. As Mr. Kachel states ferricyanide
    is more active at reducing the more exposed areas, film or
    paper. He goes on and on some more mentioning perhaps
    all the bleaching agents and their way of doing so.

    The use of ferricyanide requires less additional exposure
    than the chemistry used by Sterry who by the way many
    years earlier discovered the phenomena of latent image
    bleaching.

    BTW, his mention is only of graded papers. The method
    should work as well with variable contrast papers. Perhaps
    do without that yellow filter on my lens? The SLIMT also
    works well with film. Dan

  2. #22

    Join Date
    May 2005
    Location
    Daventry, Northamptonshire, England
    Shooter
    35mm
    Posts
    6,825
    Murray and Dan. Thanks. Murray. I should have looked at your post date. I had only just seen this thread, having followed the thread on burning in an even skyline and assumed it was new.

    Dan I could follow the Unblinkingeye article quite well, I think. While it seems to be more targetted to using a high contrast grade to retain punch and still getting shadow detail a la the young lady on beach, my conclusion was that in the case of a featureless sky, you expose for sky detail, getting this right then use the Selective Latent Image Bleaching to restore details to the foreground which otherwise would be very dark and even almost featureless black depending on the difference in the correct exposures for the sky and foreground.

    I suppose that expert dodger/ burners will say that its quicker, less messy, and just as easy to burn/dodge, possibly with flashing as it is to use Selective Latent Image Bleaching.

    El Gringo made a pretty good job of dodge/burn in the gallery for a shot which initially had the typical halo around where rocks met sky. If he reads this thread he may try this method as well.

    I suppose its a question of trying both to see which is easier and/or produces a better print.

    Thanks again

    pentaxuser

  3. #23
    Bob F.'s Avatar
    Join Date
    Oct 2004
    Location
    London
    Shooter
    Multi Format
    Posts
    3,984
    Images
    19
    Quote Originally Posted by pentaxuser View Post
    Murray. Keeps coming up with page not found. No problem with Unblinkingeye article which was referred to in the other thread on dodging and burning for uneven skylines, although not under SLIMT..

    Any help appreciated

    Thanks

    pentaxuser
    The domain expired 10-jul-2007. However, you can find a copy of the site on Archive.org at: http://web.archive.org/web/200704020...door/index.htm

    Cheers, Bob.

  4. #24

    Join Date
    May 2005
    Location
    Daventry, Northamptonshire, England
    Shooter
    35mm
    Posts
    6,825
    Quote Originally Posted by Bob F. View Post
    The domain expired 10-jul-2007. However, you can find a copy of the site on Archive.org at: http://web.archive.org/web/200704020...door/index.htm

    Cheers, Bob.
    Bob. Many thanks.You've come up "trumps" again. If memory serves me correctly it was you who gave me the directions to the late Barry Thornton's website.

    pentaxuser

  5. #25
    MurrayMinchin's Avatar
    Join Date
    Jan 2005
    Location
    North Coast, BC, Canada
    Shooter
    4x5 Format
    Posts
    4,195
    Images
    15
    Many thanks from me too

    That puppy is now forever bookmarked!!

    Murray
    _________________________________________
    Note to self: Turn your negatives into positives.

  6. #26
    eclarke's Avatar
    Join Date
    Jun 2004
    Location
    New Berlin, Wi
    Shooter
    ULarge Format
    Posts
    1,935
    Images
    71
    Ken turned me on to this article last year and I have been using this method for undeveloped negs and persulfate bleaching for developed negs, the latent bleaching is really good. You need to get a handle on each emulsion though, some go really quickly and some are very stubborn....EC

  7. #27

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    [QUOTES=pentaxuser;509789]
    "While it seems to be more targeted to using a high contrast
    grade to retain punch and still getting shadow detail a la the
    young lady on beach, ..."

    It would seem that the ferricyanide is progressively
    more effective as density increases. That lowers the
    contrast in shadow areas. Likely some other lower
    grade, Graded or VC, would do depending upon
    the negative and degree of SLIMT correction.


    "...my conclusion was that in the case of a featureless sky,
    you expose for sky detail, getting this right then use the Selective
    Latent Image Bleaching to restore details to the foreground which
    otherwise would be very dark and even almost featureless black
    depending on the difference in the correct exposures for the
    sky and foreground."

    No doubt some trial and error is involved and the novice
    will be a few hours getting the hang of it. Balancing exposure
    with post exposure frerricyanide treatment with the correct
    grade of paper will be a balancing act. So, although there
    is little to the procedure it's correct application may be
    a hurdle some will not care to jump. Dan

  8. #28
    MurrayMinchin's Avatar
    Join Date
    Jan 2005
    Location
    North Coast, BC, Canada
    Shooter
    4x5 Format
    Posts
    4,195
    Images
    15
    Quote Originally Posted by dancqu View Post
    No doubt some trial and error is involved and the novice
    will be a few hours getting the hang of it. Balancing exposure
    with post exposure frerricyanide treatment with the correct
    grade of paper will be a balancing act. So, although there
    is little to the procedure it's correct application may be
    a hurdle some will not care to jump. Dan
    Exactly like doing zone system tests for minus negative development. (It makes the most sense with sheet film or if you have a seperate camera backs for each different development regime).

    The beauty of developing negatives using SLIMT is that after the weak bleach step the negative gets developed for the same time and at the same dilution as normal negatives. This means for example that four normal negatives can go in the pre-soak, two -2 negatives get the -2 SLIMT treatment, then all six can be developed together...a HUGE time saving perk.

    Can I mention again that SLIMT is for negatives and the Sterry Method is for prints. The bleach step works the same in both methods, where its effect is proportionaly greater as density increases...but much confusion will arise if one person is talking prints and the other is talking negatives!

    Murray
    Last edited by MurrayMinchin; 08-22-2007 at 11:09 PM. Click to view previous post history. Reason: Clarifying...
    _________________________________________
    Note to self: Turn your negatives into positives.

  9. #29

    Join Date
    Sep 2002
    Location
    Willamette Valley, Oregon
    Shooter
    Medium Format
    Posts
    3,684
    Quote Originally Posted by MurrayMinchin View Post
    Can I mention again that SLIMT is for negatives
    and the Sterry Method is for prints. Murray
    The Serry method uses, IIRC, potassium dichromate.
    I'm quite sure Mr. Kachel has replaced that with potassium
    ferricyanide for both film and paper. Also I do not recall any
    other instance of the Sterry method being used with film.
    My understanding is that either chemical can be used
    but the advantages favor ferricyanide. 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