daylight process

Discussion in 'Darkroom Developing and Printing' started by lofty, Sep 30, 2007.

  1. lofty

    lofty Guest

    Hi all,
    At a loss of something to do, I have scanned a neg into my computer,
    manipulated the image, and then printed out onto an A4 transparency sheet as
    a negative, in the dark I then taped it onto a sheet of very old Kodak
    bromide paper, put a sheet of glass over it and placed it into the sun for
    about 1 hour.
    I then fixed the image and selenium toned the picture.
    I got an image with some beautiful colours and tones, but the image hadn't
    got much punch.
    I tried again using some old Ilford Galerie paper, for 2 hours and got
    different colours but again not much punch.

    how can I carry out this type of work but achieve a more punchy result?

    Thanks in anticipation

    lofty, Sep 30, 2007
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  2. What you are getting is known as photolytic silver.
    Papers designed for developing are not very efficient in
    producing it because its not desirable in normal use. There
    are ways of treating the emulsion to increase the effect, I
    don't remember the details but might be able to find them.
    My memory is that it involves treating the emulsion with a
    solution of Silver Nitrate.
    There is paper designed for this kind of printing
    called printing out paper or POP. A paper made by Kentmere
    in England was distributed in the USA as Centenial POP and
    may still be available.
    Another way might be to try one of the printing out
    alternative processes, for instance salt prints. Salt prints
    were common before modern "silver-gelatin" papers were
    invented and can be quite beautiful. A Google search for
    salt prints will get you a large number of hits including
    some with instructions. A good site to get an idea of what
    salted paper is is here:
    Richard Knoppow, Sep 30, 2007
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  3. lofty

    Peter Irwin Guest

    It seems to be. See:

    Peter Irwin, Sep 30, 2007
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