Flightchecking Your Files




Knockouts May Require Trapping

Knockouts are normal and it conserves ink too
What looks like two overlapping circles prints as a circle and a crescent
In most cases, when two objects of different colors overlap they knockout -- they won't print on top of each other.

In the above illustration it looks as if a dark gray circle is printing on top of a yellow circle. However, in reality a gray circle and a yellow crescent shape are printed side by side The yellow knocks out leaving white space for the gray circle to print on.Because what you have are two touching colors there is a chance that the colors can get out of register on the press. Knockouts may require trapping to insure that no unsightly gaps are left behind. 



Articles & Resources

Trapping - When Colors Touch How to Prevent Gaps and Avoid the Need for Trapping
Trapping digital files is the process of compensating for misregistration on the printing press by printing small areas of overlapping color where objects meet. Learn the basics of trapping and alternatives to trapping.

Trapping - Almost Touching Color
Tight registration can occur when colors come close even when not touching.

Find an explanation and illustration for knockout and how it applies in trapping.

Chokes / Spreads
Find explanations and illustrations of these trapping terms.

Manual/Auto Trapping
Learn how different types of software handles trapping in this brief overview.




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