Operation Manual

620 | CorelDRAW X8 User Guide
6 Click the Composite tab.
7 Enable the PostScript level 3 In-RIP trapping check box.
8 Click Settings.
9 Type a value in the Trap width box.
If you are trapping to black, type a value in the Black trap width box.
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.
To specify image trap placement
1
Click File Print.
2 Click the Color tab.
3 Enable the Print composite option.
4 Click the PostScript tab.
5 Choose PostScript 3 from the Compatibility list box.
6 Click the Composite tab.
7 Enable the PostScript Level 3 In-RIP trapping check box.
8 Click Settings.
9 From the Image trap placement list box, choose one of the following placements:
• Neutral density — used to determine the lighter object and thus the direction and placement of the trap
• Choke — used to trap a dark foreground object to a light background image
• Spread — used to trap a light foreground object to a dark background image
• Centerline — used when adjacent images and objects have similar neutral densities or when image density changes along an object’s
edge
If you want to trap an object to an image, enable the Trap objects to images check box.
To specify a threshold
1
Click File Print.
2 Click the Color tab.
3 Enable the Print composite option.
4 Click the PostScript tab.
5 Choose PostScript 3 from the Compatibility list box.
6 Click the Composite tab.
7 Enable the PostScript 3 In-RIP trapping check box.
8 Click Settings.
9 Type a value in one or more of the following boxes:
• Step limit — specifies a threshold between color variations. The lower the threshold value, the more likely it is that a trap will be
created.
• Black limit — specifies the threshold at which process black is considered pure black
• Black density limit — specifies a neutral density value for the black ink
• Sliding trap limit — specifies the difference between the neutral densities of adjacent colors at which a trap adjusts (slides) from the
darker side of a color edge toward the centerline. The lower the sliding trap limit, the more gradual the transition.