Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,901   Posts: 1,584,417   Online: 784
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 16
  1. #1

    Join Date
    Nov 2013
    Shooter
    Medium Format
    Posts
    2

    Creating contrast when printing very underexposed negatives.

    Hello,
    I have been trying to print some very underexposed negatives. When printing I am finding it had to create some serious contrast to avoid the dark grey taking over the print. I have been using a 5 multigrade filter yet there still seems to been alot of dark grey with like white.

    I would really appreciate any advice on the matter on creating more black and white in the print.

    Thank you,
    Tom

  2. #2
    mrred's Avatar
    Join Date
    Mar 2009
    Location
    Montreal, Canada
    Shooter
    Multi Format
    Posts
    771
    Images
    4
    Did you try an intensifier for the negatives?
    Get it right in the camera, the first time... My flickr
    Peter Carter

  3. #3
    David Allen's Avatar
    Join Date
    Nov 2008
    Location
    Berlin
    Shooter
    Med. Format RF
    Posts
    507
    Selenium toning the negatives will add contrast and is not so drastic as intensifying them.

    When printing, dodge the highlights to make them visibly brighter and extensively burn-in any shadows where there is very little (or no) shadow detail to achieve a 100% black.

    Use a strong developer such as Dokumol diluted at 1 + 6.

    Develop for at least three minutes for Fibre-based paper and at least 1.5 minutes for Resin-coated papers (turn your safelights off during the middle of the developing time if you have not tested them for how long they are safe for - incorrect installation, wrong colour, too near positioning of safelights will make your highlights go grey).

    You can then do the following to increase contrast on the print if still required:
    • Use a Chromium Intensifier.
    • Use Farmer's Reducer tho selectively brighten the highlights.
    • Tone in Selenium toner.



    Best of luck,

    David
    www.dsallen.de

  4. #4

    Join Date
    Jun 2009
    Location
    Lower Earth
    Shooter
    Medium Format
    Posts
    1,277
    Blog Entries
    2
    Images
    32
    Best of luck w/ them. I find that my underexposed/underdeveloped negs scan well but are a heart breaker in the darkroom. Granted I am not a master printer, but hopefully the tips here will help you, and me, on this. It's aggravating because you can see the images very nicely w/ a loupe, but transferring that image into a print is something else.

  5. #5
    Bob Carnie's Avatar
    Join Date
    Apr 2004
    Location
    Toronto-Ontario
    Shooter
    Med. Format RF
    Posts
    4,706
    Images
    14
    You are between a rock and a hard place.

    You will need to accept the loss of shadow detail and go for the highlight detail.

    There are many printers that would say... f...k the shadows.

    Quote Originally Posted by tmgreenhalgh View Post
    Hello,
    I have been trying to print some very underexposed negatives. When printing I am finding it had to create some serious contrast to avoid the dark grey taking over the print. I have been using a 5 multigrade filter yet there still seems to been alot of dark grey with like white.

    I would really appreciate any advice on the matter on creating more black and white in the print.

    Thank you,
    Tom

  6. #6
    piu58's Avatar
    Join Date
    May 2006
    Location
    Leipzig, Germany
    Shooter
    Medium Format
    Posts
    605
    You can squeeze a litle more contrast by
    - usage of more concentrated developer
    - longish devlopment time, just before teh borderst start to get grey or yellow.
    ---
    Uwe Pilz

  7. #7

    Join Date
    Jun 2008
    Location
    florida
    Shooter
    Medium Format
    Posts
    1,186
    Images
    2
    I don't know how important those negatives are but if they are really important to you copying them on to duplicating film such as x-ray duplicating film which tends to be more contrasty might help. It is a reversal film so you have to do the opposite. More exposure will yield a "lighter" negative thus a darker print and less exposure a "darker" negative and lighter print. You could also make a digital negative on transparent film such as Pictorico OHP. If you can re-shoot at a better exposure that would be the easiest way to go.

    http://www.jeffreyglasser.com/

  8. #8
    ic-racer's Avatar
    Join Date
    Feb 2007
    Location
    Midwest USA
    Shooter
    Multi Format
    Posts
    6,387
    High contrast paper developer can get you beyond grade 5 (like Lith developer). I'd try that first, before intensification.

  9. #9

    Join Date
    Sep 2002
    Location
    Oregon and Austria
    Shooter
    4x5 Format
    Posts
    883
    Another technique to increase negative contrast is to bleach-redevelop using a staining developer such as PMK or Pyrocat.

    The technique involves completely bleaching the silver image on the negative using a rehalogenating bleach of potassium ferricyanide and potassium bromide. This changes the silver image into silver bromide, which is a light-sensitive silver halide. Since you do this in room light, the silver image is exposed and ready to develop. After bleaching, then, you simply develop the negative to completion in your staining developer.

    The result is the silver image plus the stain from the staining developer. This extra stain adds density and contrast.

    I use the technique now and then with good success for rescuing underexposed negatives. You cannot use this technique in combination with selenium toning of the negative, as the toning solution removes the stain.

    Best,

    Doremus

  10. #10
    cliveh's Avatar
    Join Date
    Oct 2010
    Shooter
    35mm RF
    Posts
    3,675
    Images
    344
    If a chemical intensification goes wrong, you may ruin your original negative. Perhaps a safer method of increasing contrast would be to make a duplicate negative through an inter-posotive contact print on ortho film and then sandwich the original and duplicate negative together in a glass negative carrier and print that. Also, use a condenser enlarger with the highest magenta filter value you have.

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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