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GRACOL Color Profile(s)

Forum|Forum|6 years ago
February 5, 2019
2 replies
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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).

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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.

G

G_Hoffmann

Inspiring

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

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

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

Author

Community Expert

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?

Conrad_C

Community Expert

I don't know what the difference is, but since this is on a Mac, you might try comparing the two profiles in ColorSync Utility. If you double-click one, a window opens with a lot of technical info. I don't know what all of it means, but there are some items that might help…

…but the point is that you can compare it to the other profile:

I only have one GRAcol profile (Coated GRACoL 2006 (ISO 12647-2:2004) ), so my screen shot compares duplicate ColorLCD profiles found on my Mac. The highlighted areas show that they're slightly different, I don't know why.

The one GRAcol profile I have has Adobe copyright information in it when inspected in ColorSync Utility, and is installed in /Library/Application Support/Adobe/Color/Profiles/Recommended/, so I think it got installed with Photoshop.

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