In prepress and multi-color printing, a trapping technique that adjusts the size of an image and the opening in which it will be inserted. A choke is a photographic enlargement of the background color in which a second image will print. This has the effect of reducing the size of (or “choking”) the hole in which a foreground object will be printed. A spread is the slight photographic enlargement—or “spreading”—of the image that will print within the choked image. This combination of reducing the opening and enlarging the image creates a slight overlap when the images ultimately print, eliminating unwanted white spaces or gaps between the two images.
Spreads and Chokes
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