Adobe illustrator 10 Manuale Utente

The Tint Reduction value reduces the values of the lighter color being trapped; the darker 
color values remain at 100%. The Tint Reduction value also affects the values of custom 
colors.

With tint reduction value of 100%, trap contains 100% of lighter color. With tint reduction value of 
50%, trap contains 50% of lighter color.

5 Select additional trapping options as required:

Traps with Process Color if you want to convert spot color traps to equivalent process 

colors. This option creates an object of the lighter of the spot colors and overprints it. 

Reverse Traps to trap darker colors into lighter colors. This option does not work with 

rich black—that is, black that contains additional CMY inks.

6 Click OK to create a trap on the selected objects. Click Defaults to return to the default 
trapping values.

For more precise control of trapping and for trapping complex objects, you can create the 
effect of a trap by stroking an object and setting the stroke to overprint.

1 Select the topmost object of the two objects that must trap into each other.

2 In the Stroke box in the toolbox or the Color palette, do one of the following:

Create a spread by entering the same color values for the Stroke as appear in the Fill 

option. You can change the stroke’s color values by selecting the stroke and then 
adjusting its color values in the Color palette. This method enlarges the object by 
stroking its boundaries with the same color as the object’s fill.

Object stroked with 1-point stroke of fill color 
A. Stroke creates spread trap B. Fill creates knockout C. Area of trap D. Area of knockout

Create a choke by entering the same color values for the Stroke as appear in the lighter 

background (again, using the Color palette); the Stroke and Fill values will differ. This 

A

B

C

D