Update: Epson 2200 ICC profile problem

Discussion in 'Photoshop Tutorials' started by James Gifford, Dec 5, 2003.

  1. Aha - or maybe aha.

    I removed and reinstalled the 2200 drivers and profiles, and the
    printing problem (apparent ICC mismatch) is solved. But that may not
    have been the problem. It might be that I'm not completely familiar with
    PS7's changes yet.

    In PS7's printing dialog, I overlooked the shift between "Output" and
    "Color Management" and did not set the color profile here on the
    previous print attempts. I made sure the printer driver was using the
    correct profile (Premium Luster), but not that PS was. The prior print
    attempts probably used the "Same as Source" setting (Adobe '98).

    So my question boils down to: What is the difference between setting the
    PS print color space and setting the ICC profile in the driver? Why does
    PS not understand what ICC profile the printer is set to?

    Thanks...
     
    James Gifford, Dec 5, 2003
    #1
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  2. It's all explained here:
    <http://www.computer-darkroom.com/ps7_print/ps7_print_mac.htm>.
     
    Thomas Madsen, Dec 5, 2003
    #2
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  3. James Gifford, Dec 5, 2003
    #3
  4. After reading through it, this appears to be saying that I should either
    specify the correct 2200 profile in Photoshop and set the printing mode
    to "No Color Adjustment" (i.e., do what PS tells you to do), or specify
    "Printer Color Management" in PS and set the ICC profile in the printer
    driver... but not to do both.

    I understand the first two alternatives, but I don't understand why both
    PS's print management and the driver's color management should be
    enabled. (I *seem* to have gotten excellent results with both specified,
    but I could do some experimentation to see what the variation is.) The
    site referenced above just says "don't" with no real explanation - can
    anyone explain why I should not specify the ICC profile in both places?
     
    James Gifford, Dec 5, 2003
    #4
  5. Sorry, "should not be enabled."
     
    James Gifford, Dec 5, 2003
    #5
  6. James Gifford

    Bill Hilton Guest

    From: James Gifford
    Try this experiment ... open any image and select a printer profile via a soft
    proof (View > Proof Setup > Custom ...) and open the Info palette. Set the
    first eyedropper in the Info palette to 'RGB color' and click on the second
    (rightmost) eyedropper and change it to 'proof color'.

    Now select the eyedropper tool and hold it over a bright color in your image
    and you'll see the RGB color (the number in your file) is different than the
    Proof color (the second set of numbers). This is what the file RGB values will
    be translated to in order to get the closest possible match (depending on the
    accuracy of the profile) when it's printed.

    If you do either alternative (either Photoshop OR the Epson driver controls the
    color management) you will get this translation. If you have *both* Photoshop
    and the Epson driver enabled for color management this translated number gets
    translated a second time and you are screwed.

    To make it more concrete, open a blank file and select Epson's PGPP profile to
    proof with ("SP2200 Premium Glossy_PK" in the menu). Fill a portion of the
    file with say 183/18/25 (red off a test pattern I have) and you should see a
    proof triplet of 239/25/70, which will be the correct values to feed to the
    printer if the profile is correct. Either Photoshop or Epson should give you
    this number. Fill another box with this translated value and you'll see that a
    second (incorrect) translation of the proper RGB triplet gives you 255/53/126.

    So basically you wanted 239/25/70 and got it with a single translation but if
    it gets translated again it's the wrong number, in this case 255/53/126.

    The tell-tale sign of this is a strong magenta cast over the entire image.

    http://www.creativepro.com/story/feature/13605.html has a good explanation of
    why the translation is necessary in the first place.

    Bill
     
    Bill Hilton, Dec 6, 2003
    #6
  7. James Gifford

    Linelle Lane Guest

    Bill, thanks for the simple explanation. For the longest time, my problem
    was grasping the concept of resolution. Once the light bulb went on there,
    the problem was with color management...getting what I see on my monitor to
    come out of my printer. This helps a lot. Thanks again.
     
    Linelle Lane, Dec 6, 2003
    #7
  8. So... the ICC correction is being applied twice if it's specified as
    PS's output and in the printer control? Okay, that makes sense.

    As someone else already noted, thanks for a very lucid explanation. I
    really hate having instructions or tutorials just say "don't do this"
    without at least attempting to explain the "why," and you've filled that
    in nicely.
     
    James Gifford, Dec 6, 2003
    #8
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