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kaylees00
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June 12, 2020
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How to keep vibrancy of colors when converting from RGB to CMYK in pdf?

  • June 12, 2020
  • 返信数 1.
  • 16139 ビュー

Hi!

So, I'm trying to print some pdf documents that I was given, and I discovered that they were using an RGB color profile instead of CMYK. For the majority of the documents, the colors look the same when I convert them, but for some of the documents that have some more vibrant colors (a very vibrant blue), they become much duller. I've been using this tutorial from Adobe on how to convert RGB to CMYK but I don't see anything on maintaining vibrancy: https://helpx.adobe.com/acrobat/using/color-conversion-ink-management-acrobat.html 

Any help would be appreciated!

Thank you!

解決に役立った回答 Dov Isaacs

The real problem is that the gamut (i.e., range of colors) supported by typical printing CMYK color spaces is much smaller than the range of RGB colors that you can see on a computer monitor. Examples of such colors are the bright blues and bright greens you often see in office graphics. Ultimately, if you really need to maintain such vibrancy of colors, you must end of with a n-color printing process, CMYK plus additional colorants (bright green and orange, for example). Typically for such printing, you keep the colors in an ICC color managed workspace and let the printer's RIP do the color conversions as necessary to the n-colors.

 

返信数 1

Dov Isaacs
Dov Isaacs解決！
Legend
June 12, 2020

The real problem is that the gamut (i.e., range of colors) supported by typical printing CMYK color spaces is much smaller than the range of RGB colors that you can see on a computer monitor. Examples of such colors are the bright blues and bright greens you often see in office graphics. Ultimately, if you really need to maintain such vibrancy of colors, you must end of with a n-color printing process, CMYK plus additional colorants (bright green and orange, for example). Typically for such printing, you keep the colors in an ICC color managed workspace and let the printer's RIP do the color conversions as necessary to the n-colors.

 

- Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)
    deborahw14581387
    deborahw14581387
    Participant
    July 28, 2023

    Dov, 

    I'm having problems with my Magenta printing as vibrantly in the CMYK space. 

    Things are coming out with a slight green tint.  Glorious Colorado sunsets loose the pink purple. 

    Interior architectural spaces look like bad LED lighting.

     

    What might you suggest other than matching the printers specificCMYK color space properties? 

    Should I drop green out of my images in photoshop ? 

    And then just try printing until I get it right?

     

     

     

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