does anyone know why in Illustrator, I don't see the "stripes" like the picture below but when I export it into pdf, I see a lot of these stripes? I am doing science, I need to export into pdf for my paper. Thank you very much!

enter image description here

  • How is this rectangle constructed? Not as a single large rectangle, I suppose. – usr2564301 Dec 15 '18 at 15:50
  • 1
    Possible duplicate of Space between 2 paths in Illustrator – Luciano Dec 17 '18 at 10:35
  • 1
    Please add wireframe view for this document. – mrserge Jan 15 '19 at 10:06
  • If you merely need a red rectangle, constructing it out of a bunch tiny sections is simply poor construction. – Scott May 9 at 20:33

This is unfortunately something you can not fix with simple export options, or even quickly at all. Objects simply have to overlap because there is a well known, but ignored, error in the way most (if not all) vector engines render the shapes.

I have explained this in more detail here and here, and you can see a nice way to avoid it here

Simply put the programmers have made a assumption that opacity equals coverage. This is not true, it will not work. How severe the lines are depend heavily on the PDF viewer and method used to rasterize used. In general a commercial printer, should have no need for subpixel renders so there would be no coverage issues to be had, despite what your PDF preview says. Ask the printer for a proof. However for cheap home printers i wouldn't go and take this bet.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.