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Thread: Changing to CMYK profile in Photoshop

  1. #16
    Moderator super silja will become famous soon enough super silja's Avatar
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    color workflow

    Quote Originally Posted by pj1976 View Post
    What is the best icc profile to use when converting an RGB image to CMYK in photoshop?
    THanks
    It depend of your workflow, but if you follow this rule you can't be (too much) wrong
    make in your favorite program this color setup
    rgb working space = eci rgb
    CMYK working space = ISO Coated ECI v2
    color rendering intent perceptual/photo

    assume that you have digital camera/rgb scanner.
    1. make icc profile of your digital camera/rgb scanner - important step
    2. open file/scan and assign to image icc profile of your camera/scanner
    3. convert image to eci rgb, use "convert using icc profiles" ( you can use it relative colorimetric color rendering intent)
    4. do all color grading and retouching in rgb color space

    if you use photoshop make new preview setup with your output device/media profile
    if you prepare job for uncoated paper use iso uncoated, if you prepare for web offset use iso web coated impoved icc profile
    all profile you can find on [URL="http://www.eci.org"]http://www.eci.org[/URL]
    5. when you finish save job in rgb color space
    6. if you work in photoshop don't use " image convert to cmyk"
    use "convert using icc profiles"
    7. track whats happen in preview window when you choose perceptual or relative colorimetric color rendering intent.
    (if you like you can check black point compensation)
    as cmyk profile choose your printing process-device profile
    there is no rule which intent to choose, perceptual or rel colorimetric. is up to you, what you like. ( most of time i choose perceptual)
    after conversion save copy of your job

    there is a litlle benefits of 16 bits files. You can't see on the press.
    there is a little benefits if you use dithering (especialy in vignete) othervise you got very small noise

    tony14 knows what he talking about

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  3. #17
    Donor tanman10000 will become famous soon enough
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    CMYK or RBG?

    Quote Originally Posted by pj1976 View Post
    What is the best icc profile to use when converting an RGB image to CMYK in photoshop?

    THanks
    For our Mutoh, we use RBG profiles. For lithographic printing, we switch to CMYK. It's a bit of a pain to have to calibrate your colors again, but that's how we do it.

  4. #18
    Banned Gm70 is on a distinguished road
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    Quote Originally Posted by Tony14 View Post
    Hi Pj1976,

    Your CMYK ICC profile must match your printing condition.

    If you print on offset sheetfed, and the printer prints according to ISO12647-2 on paper type1/2, you must use ISOCoated v2 (300%).

    If your plan to print on the same press with uncoated paper: PSO Uncoated.icc, etc.

    If your image is dedicated to be printed for a newspaper: ISwspaper26v4, etc.

    The best way is to ask to your printer. Any case, if you do not know, make your CMYK separation with ISOCoated v2 (Biggest "standard" CMYK gamut)... the printer should be able to handle your file if it's correctly tagged (output intent)

    Hope that helps
    I would also go with Isocoated v2. At the moment it has the biggest CMYK gamut of offset profiles, so it can be re-purposed in case you want to go to for example uncoated (PSO Uncoated)

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    Junior Member riadh2002 is on a distinguished road
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    ISOCoated is the way to go.

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    Banned safaa is on a distinguished road
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    Thumbs up

    Your CMYK ICC profile must match your printing condition.

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