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Chapter 20. Output > When to apply trapping

When to apply trapping

Trapping is necessary when you print spot colors, print process colors that don't have a common color component, or print a light color on a dark background.

In QuarkXPress, trapping values are assigned to the foreground color. A light foreground color spreads into the background color by a specified amount, and a light background color chokes the foreground color. To produce a choke trap in QuarkXPress, the foreground color is assigned a negative trapping value.


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