Adobe illustrator 10 Manuale Utente

8 Select Overprint Stroke for the top line.

Copy of stroke used for spread trap 
A. Top stroke creates spread trap B. Bottom stroke creates knockout C. Area of knockout
D. Area of trap

1 Draw a line along the edge or edges that you want to trap. If the object is complex, use 
the direct-selection tool   to select the edges, copy it, and choose Edit > Paste in Front to 
paste the copy directly on top of the original.

Drop shadow with a trap. The line drawn at the intersection of two shapes creates a trap.

2 In the Stroke box in the toolbox or the Color palette, select a color value for the Stroke 
to create either a spread or a choke.

If you are uncertain about what type of trap is appropriate, see 

.

3 Choose Window > Show Attributes.

4 Select Overprint Stroke.

You can place crop marks around the image to be separated, either directly on the artwork 
or in the separations. Crop marks indicate the image area. 

Keep these points in mind when creating crop marks for color separations:

If you are setting crop marks in the original artwork and want the artwork to contain a 

bleed (a margin added to the image so that it can be trimmed after printing), make sure 
that you extend the artwork past the crop marks to accommodate the bleed. 
(See 

If you plan to separate several small pieces of artwork in the same file, you can create a 

set of trim marks for each piece of artwork. You might want more than one set, for 
example, if the file contains several business cards that you plan to separate. To create 

A

B

C

D