Convert RGB to CYMK for printing without color loss (Help!)

Discussion in 'Design and Graphics' started by Teddersg, Jun 8, 2014.

  1. Teddersg macrumors newbie

    Joined:
    Apr 24, 2014
    #1
    Hey everyone! I'm going to be ordering a big poster print job this week. These posters will be sold and some given away at certain events. The site requires me to have a PDF CYMK file of the image. I'm an amateur pixelmator guy and discovered there's no CYMK, so I used photoshop. I ordered a test print at Office Depot after the CYMK conversion before making the order to see if the image lost quality. The image looks great (I sharpened the image a bit), but the colors aren't vibrant...

    I've printed this image before without manipulation, and the colors have always looked great.

    Does anyone know how to keep the vibrancy of the image? Or at the very least not so bland? Maybe I can hire someone here who can do it for me?

    The attachment shows the original image on the right and the left image is the poster print out.

    Greatly appreciated. Thanks!
     

    Attached Files:

  2. citizenzen macrumors 65816

    Joined:
    Mar 22, 2010
    #2
    First off you need to know that CMYK is a limited color space.
    [​IMG]
    See that small area in the middle of the graphic?
    That's what you have available to reproduce your poster.

    :(

    But it's also possible that particular printer isn't very good. I think you should expect better results than what you're showing.

    I would take the file to other printers—consider a local offset printer who does quality work. They are more likely to have a device that accurately reproduces CMYK.

    Find the printer that works best for both the color and the per unit cost.

    They are out there ... but you might need to dig a bit.
     
  3. Larry-K macrumors 68000

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    Jun 28, 2011
    #3
    What color spaces in RGB and cmyk were you using?
     
  4. decksnap macrumors 68040

    decksnap

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    Apr 11, 2003
    #4
    Did they request cmyk? If they aren't using a four color press they would probably actually prefer the rgb. I've run into this in the past with photo printing companies.

    Edit we'll I can't read. But if Office Depot is not where your final print is being made, my input still stands. Office Depot equipment would obviously be completely different from a real press. Expect some dulling though as many rgb colors are outside cmyk gamut.
     
  5. powers74 macrumors 68000

    powers74

    Joined:
    Aug 18, 2008
    Location:
    At the bend in the river
    #5
    Paper & print settings are also a big factors. You ought to be able to get a little more pop out of it tho. It's all about trial & error.
     
  6. macuser453787 macrumors 6502

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    May 19, 2012
    Location:
    Galatians 3:13-14
    #6
    You could see if their website recommends any specific input (RGB) and output (CMYK) ICC profiles and use them as your source and destination color spaces when converting your image to CMYK to see if that gives you a better result.

    It is absolutely true that CMYK is a smaller color gamut than RGB, and with that being said, there will be some color loss regardless. It's unavoidable because that's the nature of it.
     
  7. citizenzen macrumors 65816

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    Mar 22, 2010
    #7
    Some of our vendors just say to convert to CMYK ... and I'm like, "CMYK ... what?"
     
  8. macuser453787 macrumors 6502

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    May 19, 2012
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    Galatians 3:13-14
    #8
    LOL that's funny! Just started using a new Prepress workflow at my workplace and I've had quite an education in color management recently. :)
     
  9. Larry-K macrumors 68000

    Joined:
    Jun 28, 2011
    #9
    It's easy to say that, but there is no one "cmyk". Ask them which "cmyk" profile they prefer, or they may even have a custom profile for their press.

    That being said, vibrant oranges, greens and purples are problematic in the best of situations with cmyk.
     
  10. macuser453787 macrumors 6502

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    Galatians 3:13-14
    #10
    I think that's what he meant when he said "CMYK ... what?" That is to say, which CMYK profile to use.
     
  11. Larry-K macrumors 68000

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    Jun 28, 2011
    #11
    The average person doesn't even know cmyk exists.
     
  12. macuser453787 macrumors 6502

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    May 19, 2012
    Location:
    Galatians 3:13-14
    #12
    True enough, though I'm not sure I understand why you're saying that.

    Let's backtrack for a moment. I was simply offering this explanation to you:

    ...because you said:

    ...in response to this post:

    ...because when you said:

    ...it seemed that you didn't quite understand what the other poster said when he posted this:

    ...so I was trying to clarify for you by saying:

    Makes sense? :)
     
  13. Larry-K macrumors 68000

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    Jun 28, 2011
    #13
    I don't think the OP had ever hear of cmyk, is that clear? Perhaps he'll enlighten us.
     
  14. macuser453787 macrumors 6502

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    Location:
    Galatians 3:13-14
    #14
    Oh, now I see - your initial response was for the benefit of the OP, not the poster you quoted in your response who said "CMYK... what?".

    Yeah, not sure if the OP knew about CMYK or not.
     
  15. Larry-K macrumors 68000

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    Jun 28, 2011
    #15
    That's it, is the question "cmyk...what?" or "What cmyk?"?
     

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