Overprint modes and object types

A PDF file may contain different types of objects, such as text, line art and images. Some object types have an overprint behavior which depends on the overprint mode, others don’t. We can distinguish the following:

Overprint-mode-dependent object types

Overprint-mode-independent object types

CMYK text

CMYK images

CMYK line art

CMYK shadings

CMYK image masks


In other words, overprint modes only have an effect on CMYK text, line art and image masks.

There are two “overprint modes”:

The difference between both modes lies in the effect of the tint value 0 for one of the CMYK inks: