White overprint

When printed with overprint enabled, white objects don't knock out underlying artwork. As a result, underlying colors remain visible and the white object may appear absent in the final output.

Illustrator automatically detects and removes unintentional white overprint during output to help preserve the intended appearance of your artwork.

What white overprint means for your artwork

Overprint instructs the printing press to print one ink over another instead of knocking out the underlying color. For most colors, this can create intentional color-mixing effects. However, when white is set to overprint, the underlying artwork remains visible, causing the white object to appear absent in the final output.

White overprint issues are typically visible only when you enable Overprint Preview or inspect color separations. In the standard document view, white objects appear solid regardless of their overprint settings.

How white objects acquire overprint unintentionally

White objects can acquire overprint unintentionally in the following situations:

When you create new artwork after selecting an object with overprint applied, the new object inherits the appearance attributes of the selected object. If the new object uses a white fill or stroke, it also inherits the overprint attribute.

White overprint can also occur when you change an overprinted object to a white fill or stroke. The object retains its overprint attribute after the color change.

Illustrator displays a warning when you manually apply overprint to a white object. However, inherited or retained overprint attributes do not trigger this warning.

How Illustrator resolves white overprint automatically

The Discard White Overprint option removes overprint attributes from white objects during output without modifying the original artwork file. This option is available in both the Document Setup and Print dialogs and is enabled by default.

When enabled, this option removes overprint from white objects while printing or saving artwork to EPS or PDF. The artwork file itself remains unchanged. This behavior helps prevent unintended white overprint in both existing and newly edited artwork.

If you disable this option in Document Setup, you can enable it again in the Print dialog before printing.

Spot white and overprint

Objects filled with spot white colors are not affected by the Discard White Overprint option. This option applies only to process white (C=0, M=0, Y=0, K=0) and standard white colors in RGB documents.

This behavior preserves intentional spot white overprint settings while preventing unintended process white overprint.

Understanding overprint in context

Overprint controls how colors interact during printing. By default, objects knock out underlying colors. When overprint is applied, the underlying colors remain in place and print beneath the selected object.

When artwork includes both transparency and overprint settings, review the output carefully to ensure the expected appearance. Understanding how transparent objects interact with underlying artwork is easier with the information provided in transparency and blending modes.