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• • October 26, 2011 at 7:22 pm #60920
    SamMustafa

    Member

    When I place CMYK images (from Photoshop) over a Pantone background, I get a grey rectangular shadow around them when I export to a PDF. (It's the outline of the selection box, except filled-in with grey, and it's not visible while working in I-D, only once you export to a PDF.)

    There was an article about a similar problem, by Steve Werner, some years ago: https://creativepro.com/eliminating-the-white-box-effect.php.

    But he's talking about the effect having to do with Overprint settings. I never get to the Overprint settings; it happens when I export.

    I tried changing the Pantone background color to a Swatch with similar CMYK values, but that made no difference.

    This seems to be a CS5.5 bug; I never had this problem in CS3. The grey rectangle is noticeable when the images are at angles, or are not square. (I assume it's still there for a square or rectangle, too, just hidden “under” it.)

    The only fix I've found thus far is to export the document as an Interactive PDF, rather than the Adobe print settings, and that's hardly a fix, since I need to print.

    Has anybody encountered this or know of a fix?

  • October 27, 2011 at 5:52 am #60923
    Anonymous

    Inactive

    This can happen when Flattening the file.

    It's not a bug. There's another reason https://creativepro.com/eli…..ndrome.php

    If your final print job is only CMYK (no spot colours) then there is no need to use Spot colours. You can convert the spot colours to CMYK. It's best to use Pantone book (printed book not online or anything) to get an accurate CMYK valuation, sometimes the conversion can cause a slight colour shift due to them being different gamuts (ranges of colour).

    And if you don't need to flatten the file choose Adobe PDF 1.5 standard.

    If this is going to Print, then check with your printers and ask them what settings to use, or better yet get a .joboptions file from them.

  • October 27, 2011 at 5:54 am #60924
    David Blatner

    Keymaster

    The fact that this is “fixed” when you export as interactive pdf makes me think that there's something going on involving rgb vs. cmyk. Is it only when a spot color is involved? Is Transparency Blend Mode set to CMYK or RGB? Are all colors (other than spot colors) specced as CMYK? Have you turned on Use Lab Values for Spot Colors in the Ink Manager dialog box?

  • October 27, 2011 at 7:19 am #60927
    SamMustafa

    Member

    Eugene Tyson said:

    This can happen when Flattening the file.

    It's not a bug. There's another reason https://creativepro.com/eli…..ndrome.php

    ---

    Hi Eugene, I saw that old article; that's how I found the Steve Werner article. But changing the Flattener presets hasn't had any effect on the export to PDF.

    Also – call me stupid, but… I've never had “Composite CMYK” as an option on my Print > Output menu. I'm only able to select RGB and Greyscale. What should I do, to enable CMYK there?

    * It's also pretty mystefying to me, because I did large, elaborate books in CS3 for years, and had plenty of CMYK images over a Pantone background, and never had this problem until I upgraded to CS5.

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