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Thread: [HELP] Changing image colours in a PDF

  1. #16
    Junior Member Willie is on a distinguished road
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    Colour management in RIP

    Check out the latest color management in rips from the BIG players, they can adjust cmyk independent of rgb independent of greyscale all while keeping text pure, yep even rich black text.

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  3. #17
    Junior Member zhangxueqing is on a distinguished road
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    Question

    I think RGB is better than cmyk in pdfs now
    in digital print

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  5. #18
    Member print2011 will become famous soon enough
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    U may convert font's to outline and open in Illustartor.

    Second way: try change profile.

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  7. #19
    Junior Member muskus2000 is on a distinguished road
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    Quote Originally Posted by print2011 View Post
    U may convert font's to outline and open in Illustartor.

    Second way: try change profile.
    pitstop professional is the best solution.. WHatever you want you can do... not only for linework bu also for images too... If you use Onyx production house, it has special icc workflow to lighten images

  8. #20
    Junior Member piratefree is on a distinguished road
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    Quote Originally Posted by p.eulampy View Post
    You can use Acrobat Advanced Editing tool called 'Touch Up Object' - right click on RGB bitmap, select 'Edit image', correct it in Photoshop (apply working profile) and save - Acrobat will update it in pdf.
    how can I change to CMYK color profile in the Acrobat?

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  10. #21
    Junior Member piratefree is on a distinguished road
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    Quote Originally Posted by LarryX View Post
    One off the possible problems also Big resolutions bitmap (raster) objects/
    if they are less more 2x bigger than Rip Lpi...
    (for example: 175 lpi requires no more than 350 dpi per bitmap object's)
    or if you print on office printer - resolutions required no more than 600 dpi...

    ---when bitmap send to rip or printer in big resolutions, this get a darked...
    generally we work with 305dpi for images.

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  12. #22
    Banned JoseArmando is on a distinguished road
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    Pitstop is what you need my friend.

  13. #23
    Junior Member shiv is on a distinguished road
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    use pitstop action or go to global change and remap the colour

  14. #24
    Junior Member pankrakonos is on a distinguished road
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    Always use the CMS and correct profiles when converting RGB-CMYK.
    Problems with monitor/printing may be because of uncorrect monitor calibration or different print profile/material choise.

  15. #25
    Junior Member printrooot is on a distinguished road
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    You should change Printer cuves

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  17. #26
    Junior Member pinoy969 is on a distinguished road
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    it looks like the callas pdf toolbox is good software, I haven't tried this but watch some video on youtube and it looks good on converting pdf files.

  18. #27
    Junior Member Joeric is on a distinguished road
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    Actually, 'Touch Up Object' in Acrobat Advanced Editing tool is really useful, Image Editing for Image in Photoshop, while Object Editing for vector in Illustrator, but remember this fuction you could only find in Professional version.

  19. #28
    Junior Member Joeric is on a distinguished road
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    And, One more thing you should know is how to convert RGB to CMYK inside Acrobat. That is simple without any plugin.
    you could find Convert Color under Print Production Menu. and then you may assign a CMYK profile for RGB object, and then confirm and exit. it is done.
    so you also are able to convert all the color image to Gray just with a Gamma 1.8 Profile selected, or something like that.
    Wish it is what you want to get....

  20. #29
    Banned chenzhi is on a distinguished road
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    You can do a ICC profile to reduce the amount of printer's ink, but to print out the file will be overall adjustment not only for the pictures to adjust.

  21. #30
    Banned yarnik is on a distinguished road
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    RGB to CMYK color will certainly vary, good color management is set before the first turn

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