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  1. #1
    SuperMario is offline Junior Member
    Join Date
    Oct 2012
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    Molenaarsgraaf
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    2

    Question Conversion from U.S WebCoated (SWOP) to IsoCoated V2

    I have a pdf with an U.S. Webcoated(Swop) output intent.
    This has a yellow square wich is 4% c, 0% m, 94% y, 0 black.
    When i convert this to the IsoCoated profile, i get different colorvalue's: 8% c, 0% m, 86% y, 0 black
    I did this conversion with GMG Colorserver.

    Is it correct this way? Because the yellow become's much greener this way.

  2. #2
    Correct Color is offline Senior Member
    Join Date
    Feb 2010
    Location
    Austin, TX
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    171

    Default

    You're probably using perceptual rendering intent. Try relative colorimetric.

    Mike Adams
    Correct Color

  3. #3
    Stephen Marsh is online now Senior Member
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    1,600

    Default

    I tested the L*a*b* values quickly in Photoshop using AbsCol rendering intent:

    Original colour values = L83 a-8 b76
    New colour values = L87 a-8 b75

    They are both as green as each other and almost as yellow as each other, the major difference being the L value... Despite/independently of Lab values, I don't think that cyan is good when you want yellow, a little magenta would be better (this being an artistic viewpoint and not a scientific one).

    Relative intent gives different numbers in the above test, with the green being the same with more variation in the yellow.


    Stephen Marsh

  4. #4
    lyzan is offline Member
    Join Date
    Jun 2008
    Posts
    57

    Default

    Did you create your own MX4 in GMG?


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