I have a pdf which has some transparent graphics and words. Like this:(of course it had more words )

origin pdf

then I use \includepdf command to insert this to a latex project .


then I curve this pdf through ghostscript tool

gs -sDEVICE=pdfwrite -sProcessColorModel=DeviceCMYK -sColorConversionStrategyForImages=CMYK -sColorConversionStrategy=CMYK -o ./dest.pdf -f ./source.pdf

then it becomes like this: after \includepdf and curve

After using pdf-praser to analize it

/usr/bin/python pdf-parser.py  -o 67 document.pdf

, I found


command in latex makes pdf structure has changed a lot.

origin pdf has a /group which contains transparency information if I am not wrong : enter image description here

but then it just disappear.

I wonder the reason and it troubles me a week .

Hope for answer.


It's my test pdf files.

  • origin-file.pdf is origin pdf file;

  • delete-redundant-thing is the file which I delete redundant words and images to convenient test ;

  • after-includepdf.pdf is the file which I use \includepdf{} command in latex;

  • after-gs.pdf is the file which I use ghostscript line command to curve ;

  • 1
    Could you add a MWE that replicates your problem? and Welcome to TeX.Se – Raaja May 9 at 9:36
  • sorry , I don't understand the meaning of MWE. – user10920710 May 9 at 9:59
  • 1
    We need something that we can use for tests. – Ulrike Fischer May 9 at 11:18
  • I don't find a way to upload pdf ~ , maybe I can give you a github url github.com/David553/latex.git – user10920710 May 9 at 12:09
  • 1
    Welcome to TeX.SX! Please help us help you and add a minimal working example (MWE) that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass{...} and ending with \end{document}. – Martin Schröder May 9 at 12:32

Use an PDF newly produced by adobe illustrator2019 and textLive 2019 solve this transparency problem.

thanks to

I cannot see it with an up-to-date TeXLive 2019 and ghostscript 9.26 – Red-Cloud May 9 at 12:26

AI software gives me a hint that pantone color with transparency and transform to print color such as CMYK may cause unexpected problem!

The AI software hint

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