Quick links to procedures on this page:
Specifying In-RIP trapping settings
In-RIP trapping allows you to specify advanced trapping settings. Before selecting In-RIP trapping, ensure that your PostScript 3 printer supports In-RIP trapping options.
You can select a trap width—the amount that one color spreads into another. You can also specify image trap placement, which determines where the trap occurs. You can, for example, specify whether the trap is a choke or a spread, depending upon the neutral densities of adjacent colors. Neutral density indicates the lightness or darkness of a color and helps determine how adjacent colors spread into one another.
You can specify a threshold at which a trap will be created by specifying a step trap limit. If trap colors are of similar neutral densities, the trap placement will be adjusted accordingly. The step trap limit specifies a threshold at which a trap will adjust.
Before trapping, you can set the inks; for example, you can set an ink to opaque, as in the case of a metallic ink, so that nothing shows through it. To reduce the visibility of a trap, you can decrease the amount of ink color in a trap. This is especially helpful in the case of pastel colors, contrasting colors, and colors with similar neutral densities.
To select a trap width |
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To select In-RIP trapping options, you must have selected PostScript 3 from the Compatibility list box under the PostScript tab of the Print dialog box.
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To specify image trap placement |
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Neutral density — used to determine the lighter object and thus, the direction and placement of the trap
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Centerline — used when adjacent images and objects have similar neutral densities or when image density changes along an object’s edge
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To select In-RIP trapping options, you must have selected PostScript 3 from the Compatibility list box under the PostScript tab of the Print dialog box.
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To specify a threshold |
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Step limit — specifies a threshold between color variations. The lower the threshold value, the more likely it is that a trap will be created.
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To select In-RIP trapping options, you must have selected PostScript 3 from the Compatibility list box under the PostScript tab in the Print dialog box.
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To set inks for trapping |
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Click Type, and for each color separation, select one of the following:
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To select In-RIP trapping options, you must have selected PostScript 3 from the Compatibility list box under the PostScript tab in the Print dialog box.
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To select a trap color reduction |
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A reduction value of 100% indicates no reduction, while a lower value reduces the neutral density.
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To select In-RIP trapping options, you must have selected PostScript 3 from the Compatibility list box under the PostScript tab in the Print dialog box.
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