Adobe Acrobat 7 Professional - Manual (Page 578)

Specifying Adobe In-RIP Trapping options
Trapping is a complex process that depends on the interaction of various color, ink, and
printing factors; the correct settings vary, depending on specific printing conditions. Do
not change the default trap settings unless you've consulted with your prepress service
provider, and read the trapping topics referred to in the following procedures to make sure
that you understand how trapping options work in the context of your specific document
and printing conditions.
You specify trapping options in several places in Acrobat:
●
In the Trap Presets dialog box, you edit, delete, or create new presets, as well as assign
presets to pages in the document.
●
In the Ink Manager, you enter ink type, trap sequence, and neutral density. These values
help control in-RIP trapping.
●
In the Advanced Print Setup dialog box, you select Adobe In-RIP Trapping.
●
In the Document Properties dialog box, you specify whether an Adobe PDF file contains
trapping information from the source application.
Acrobat supports Adobe In-RIP Trapping. To trap documents using the Adobe In-RIP
Trapping engine, you need the following software and hardware:
●
A PPD (PostScript Printer Description) file for a printer that supports Adobe In-RIP
Trapping. You must select this PPD by using the operating system driver.
●
An Adobe PostScript Level 2 or later output device that uses a RIP that supports Adobe In-
RIP Trapping. To find out if a PostScript output device supports Adobe In-RIP Trapping,
contact the manufacturer or your prepress service provider.
To trap an Adobe PDF document:
1. If necessary, create a trap preset with custom settings for your document and press
conditions. (See Using trap presets to specify trap settings .)
2. Assign the trap preset to a page range. (See Assigning a trap preset to pages .)
3. Choose File > Print to open the Print dialog box, and then click Advanced.
4. Select Output from the list on the left.
5. For Color, choose In-RIP Separations.
6. For Trapping, choose Adobe In-RIP. This option works only when you target an output
device that supports Adobe In-RIP Trapping.
7. Click Ink Manager. As necessary, select an ink, specify the following options, and then
click OK:
●
For Type, choose an ink type that describes the selected ink only if your prepress service
provider recommends changing this setting. (See
Working with specialty inks or
varnishes .)
●
For Neutral Density, type a value that differs from the default only if your prepress service
provider recommends changing this setting. (See
Adjusting ink neutral density values .)
●
For Trapping Sequence, type a value to set the order in which inks are printed only if your
prepress service provider recommends changing this setting. (See
Specifying trapping
sequence .)
●
Continue specifying other print options, and then click Print to print your document.
Related Subtopics:
Using trap presets to specify trap settings
Assigning a trap preset to pages
Setting trap widths
Setting trap appearance
Setting trap thresholds
Adjusting trapping tolerance
Using sliding traps
Trapping imported images
Trapping with black and rich black
Adjusting ink neutral density values
Working with specialty inks or varnishes
Specifying trapping sequence