Gamma of color printing paper

Discussion in 'Darkroom Developing and Printing' started by Monica Schulz, Jan 16, 2008.

  1. dear ng,

    just beginng to dive into the subject matter of the negative-positive
    process I stumbled upon the data sheets of Kodak color printing papers
    and wondered why they all show such steep characteristic curves.
    Shouldn´t their gamma value be around 1,4 so that in combination with
    the negative there is a gamma of 1? Is this just because people love
    prints with so much snap?

    Best!
    Monica
     
    Monica Schulz, Jan 16, 2008
    #1
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  2. Monica Schulz

    Ken Hart Guest

    dear ng,

    just beginng to dive into the subject matter of the negative-positive
    process I stumbled upon the data sheets of Kodak color printing papers
    and wondered why they all show such steep characteristic curves.
    Shouldn´t their gamma value be around 1,4 so that in combination with
    the negative there is a gamma of 1? Is this just because people love
    prints with so much snap?


    Typically, the amatuer papers (Kodak Royal, for example) have high contrast
    because the amatuer cameras don't have good contrast lenses. If you want a
    lower contrast paper, try the pro types, like Kodak Endura's. The pro types
    will usually have the 'do not copy' messge on the back.

    If you are just starting color printing, here are two helpful hints: 1. Get
    the density right, then go for the color balance. 2. Write down your
    printing exposure.
     
    Ken Hart, Jan 16, 2008
    #2
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  3. Well, I looked at the curves of Kodak Ektacolor Edge and Kodak
    Professional Pro Image and if I measure the slope of the straight
    section and take the tangent I find a gamma of more than 3. That´s
    what astonishes me but maybe I´m wrong somehow?!

    <snip>
     
    Monica Schulz, Jan 17, 2008
    #3
  4. Edge is the highest-contrast paper Kodak makes. If they still make it,
    Portra is the paper you want for most professional use (the medium-contrast
    paper in sheets is, or was, "Supra", and the high-contrast one "Ultra").

    Pro Image is made for laser recording in machines like the Frontier, isn't
    it? Those systems adjust the image digitally so almost any paper contrast
    will work so long as the curves of the paper are known.
     
    Thor Lancelot Simon, Jan 20, 2008
    #4
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