Please help

[Gianluca5C31]

Hi everyone, I have a big problem esporting my project to PDF. Once i export in desktop and open my pdf, i can see a lot of white line all over my photo, how can i do? Please help me I have a graduation exam

[Ton Frederiks]

Is that a photo? Or did you trace it to convert it to vector?

[Gianluca5C31]

Basically i imported some images in illustrator and then i do tracing image, i select gray scales and then exported to PDF. Once open that PDF i saw that awful lines...

[Ton Frederiks]

Did you expand the tracing?

[Gianluca5C31]

I don't know what that means...

[Ton Frederiks]

Object > Image Trace > Expand

[Gianluca5C31]

No, i always had the same window open.

 

[Ton Frederiks]

Object menu (Ogetto) > Image Trace > Expand

[Gianluca5C31]

Ok now i have this 

[Ton Frederiks]

And when saved as PDF, does it make a difference?

[Gianluca5C31]

No, it's always the same

[Monika Gause · Accepted solution]

Those are anti-aliasing artifacts. Most of the time they are only an issue of displaying on screen. With complex tracings they could be an actual issue of precision.

With offset printing you should not notice that in the printed result. With other printing methods it could carry over into the print.

What is it you want to do with the trace?

You could try and check the Overlapping option when tracing.

[Gianluca5C31]

Hi, i simpli have to export my project to PDF and send it to my teacher, but with those lines, it wont be ok... How can i check that overlapping option?

[Gianluca5C31]

simply* sorry

[Gianluca5C31]

THANKS! The error was that button