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Mike_Gondek10189183
Community Expert
Mike_Gondek10189183Community Expert
Community Expert
February 5, 2019
Answered

GRACOL Color Profile(s)

  • February 5, 2019
  • 2 replies
  • 13602 views

Wanted to learn more about the gracol color profile(s), to learn about your experiences with this profile. We have a dozen retouchers, and atleast one of them has a different version of the color profile.

They both have coated & 2006 in the name, and when reassigning the profile on the oddballs to the make the profiles all exactly the same, I do not visually see a shift. Anyone know why there are 2 different Gracol color profiles and why the printing companies prefer Gracol (we have 3 printers for this color newspaper weekly sale paper).

    This topic has been closed for replies.
    Correct answer G_Hoffmann

    Some more information:

    Coated_GRACOL (long name in the graphic):

    Signed by Adobe, 2009/6/26

    GRACOL..._Coated (long name in the graphic)

    Signed by X-RITE, 2007/1/28

    The newer the better? Maybe.

    Tiny differences in the gamuts in the lower part of the volume are hardly relevant

    This graphic doesn't say anything about GCR.

    Diagrams for GCR, here for "Gray Balance":

    Not very different, concerning the strategy.

    2 replies

    G
    G_Hoffmann
    Inspiring
    February 7, 2019

    Mike,

    here is a list by the ICConsortium with several profiles, with fundamental

    parameters:

    TAC, GCR, MaxK, TVI (Tone Value Index, formerly called Dot Gain).

    More information is found by clicking on the profile name.

    ICC Profile Registry

    The graphic in #3 shows TVI. It does not show GCR, for which one

    needs four curves, as used by Gretag-Macbeth ProfileMaker (for

    inkjet RIPs). Changing the "strength" of GCR shows how the curves

    are modified.

    For offset profiles GCR is simply characterized by Medium or Max.

    Dan Margulis, Professional Photoshop, here 4.Edition 2002, had

    explained the meaning of different GCR strategies very well, IMHO.

    Best regards --Gernot Hoffmann

    G
    G_HoffmannCorrect answer
    Inspiring
    February 7, 2019

    Some more information:

    Coated_GRACOL (long name in the graphic):

    Signed by Adobe, 2009/6/26

    GRACOL..._Coated (long name in the graphic)

    Signed by X-RITE, 2007/1/28

    The newer the better? Maybe.

    Tiny differences in the gamuts in the lower part of the volume are hardly relevant

    This graphic doesn't say anything about GCR.

    Diagrams for GCR, here for "Gray Balance":

    Not very different, concerning the strategy.

      c.pfaffenbichler
      Community Expert
      c.pfaffenbichlerCommunity Expert
      Community Expert
      February 6, 2019

      I work in Europe so I have no relevant experience with GRACoL, just curious: Do the two profiles have the same GCR or do the images’ Channels differ?

      Mike_Gondek10189183
      Community Expert
      Mike_Gondek10189183Community ExpertAuthor
      Community Expert
      February 6, 2019

      Not sure how to find GCR settings for Gracol. I click on CMYK: Gracol, and  changes to Custom CMYK to get GCR settgings, but in process it changes to SWOP coated

      The channels are RGB, are you asking me to do a difference calculaiton between 2 test files possibly?

      c.pfaffenbichler
      Community Expert
      c.pfaffenbichlerCommunity Expert
      Community Expert
      February 7, 2019
      Not sure how to find GCR settings for Gracol.

      It should suffice to compare the K-Channel for the same image separated in the two profiles to see if there is a difference.

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