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USING ACROBAT X PRO
Print production tools
Last updated 10/11/2011
Ink Manager
Modifies the way inks are treated while the current PDF is open. The Acrobat Ink Manager uses the same
options and controls as other Adobe applications.
Set Page Boxes
Allows you to define the crop, trim, bleed, art, and media boxes on a page. The elements are important
for proper page positioning and placement of printer marks, especially for imposition.
Add Printer Marks
Adds standard printer marks to a PDF page for positioning. These marks are embedded in the PDF.
Fix Hairlines
Based on user settings, finds hairlines and replaces them with heavier-weight lines.
Flattener Preview
includes a preview for viewing transparent objects and the effects your settings have on those
objects. Use Flattener Preview to create the presets that can be used when flattening transparency. You can use the
presets to control the amount of rasterization that occurs during print output for the document. You can save these
settings as a preset for future use.
JDF Job Definitions
Allows you to create custom job definitions that can be edited and used in a production
environment. The JDF file also include information necessary for the creation of PDFs appropriate for the production
process, including PDF conversion settings and preflight profiles.
Trapping color
About ink trapping
When an offset printed document uses more than one ink on the same page, each ink must be printed
in register
(perfectly aligned) with any other inks that it abuts, so that there is no gap where the different inks meet. However, it’s
impossible to ensure exact registration for every object on every sheet of paper running through a printing press, so
misregistration
of inks can occur. Misregistration causes an unintended gap between inks.
You can compensate for misregistration by slightly expanding one object so that it overlaps an object of a different
color—a process known as
trapping
. By default, placing one ink over another
knocks out
, or removes, any inks
underneath to prevent unwanted color mixing; but trapping requires that inks
overprint
, or print on top of each other,
so that at least a partial overlap is achieved.
Misregistration with no trap (left) and with trap (right)
Most traps employ
spreading
—expanding a light object into a dark object. Because the darker of two adjacent colors
defines the visible edge of the object or text, expanding the lighter color slightly into the darker color maintains the
visual edge.
Adobe In-RIP trapping
Acrobat can automatically trap color documents with the Adobe In-RIP Trapping engine, which is available on Adobe
PostScript output devices that support Adobe In-RIP Trapping.
Summary of Contents for 22020737 - Acrobat Pro - PC
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