Question regarding the nature of grain

Discussion in 'Darkroom Developing and Printing' started by Monica Schulz, Jun 28, 2007.

  1. hi ng,

    I ´ve a question regarding the understanding of the nature of grain in
    photographic film. As I understand it what´s normally called "grain"
    is the perceived clumping of the silver particles through the depth of
    the emulsion. But the size of those silver-halide crystals is between
    0,2 and 2,0 µm and grain is said to be between 10 to 30 µm, so both
    are well below what our visual system can resolve. Therefore most
    publications state that extreme magnifications are needed to see the
    grain. So what is the grain pattern we see on only moderately enlarged
    prints? Could it just be the pattern of density differences which are
    caused by the clumping of the silver particles?

    Best regards!
    Monica
     
    Monica Schulz, Jun 28, 2007
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  2. Monica Schulz

    user Guest

    You got it. What you see is largely the space between the clumps.

    Here is a very grainy image. It was done in the early days of 'fast'
    film: 2475 recording film processed in HC-110B.

    http://www.digoliardi.net/mypages/p7.htm
     
    user, Jun 28, 2007
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  3. I normally don't like grain but I think it adds
    something to this picture. Its a great picture.
    No comment on your explanation, its right on.
     
    Richard Knoppow, Jun 28, 2007
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