Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Overprint Support #7360

richerm opened this issue May 26, 2016 · 1 comment


Copy link

commented May 26, 2016

Link to PDF file (or attach file here):


  • Chrome 51, Firefox 45, IE11
  • Windows 7 / 10
  • PDF.js version: Latest PDF.JS Demo Site
  • Is an extension: No

Steps to reproduce the problem:

  1. Upload the document to the PDF.JS demo site.
  2. Compare it with what is rendered in Adobe.

What is the expected behavior?
See screenshot for comparision.

Lack Overprint Support

  • (Page #1 - Item 3,4,5,6,7)
  • (Page #4 - Item 25,26,27,28,29,30)

NOTE: Other unsupported features can be seen, however, we have a desire for overprint (simulated) support.


This comment has been minimized.

Copy link

commented May 26, 2016

Overprint is optional feature (and the specification does not require support for it and I think only Reader supports it). Marking as such. To properly make it work output medium must support CMYK natively and web APIs do not.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
None yet
2 participants
You can’t perform that action at this time.