Xerox C8 - DocuPrint Color Inkjet Printer, User Manual, Page: 445 / 458

Glossary 431
Output tone curve A graph showing the relationship of original input densities and the
corresponding dot percentages on film.
Overprint A technique, which overlaps colored elements to eliminate the
appearance of gaps between elements caused by misregistration of the
various separations during printing. For example, black text is
normally set to overprint. See also
Trapping
and
Misregistration
.
PDL Printer Description Language files (for example, PostScript, PDF,
EPS, VPS, VIPP). The CXP8000 Color Server processes image files in
PDL formats, converting them into a suitable Ready-To-Print format
for direct, high-quality printing.
PICT A Macintosh file format for bitmaps and vector graphics.
Pixels
Contraction of Picture Element. The smallest element of a digital
image.
PostScript®
A programming and page description language that has become
industry standard for electronic publishing. It is used to describe the
entire page, including both text graphics and images. PostScript is
completely independent of the printing device. Developed by Adobe
Systems, Inc.™
Prepress Generic term used to describe the processes involved in preparing
images for printing. Includes the input, edit and output stages.
Printer description files PPDs (PostScript Printer Definition), and PDFs (Printer Definition
Files). These files are used by the Macintosh applications to prepare
page and documents for specific output devices.
Process colors
The four ink colors used to reproduce full color images - cyan,
magenta, yellow and black.
PSImage
A low-resolution EPS file used in the Creo APR workflow. This file is
used for positioning in page layout. Changes made to this file will be
applied to the high-resolution file, which automatically replaces it
shortly before exposure. See also
APR .
Quartertone
The tone area of an image influencing highlight detail and with
density values between the white point and midtone. Typically,
printed with a dot area near 25%. See also
Highlights
,
Midtones
,
Shadows .