Creo CXP6000 Color Server, Руководство пользователя

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42 Chapter 3 – Working From a Client Workstation
Black Overprint
Yes
provides better printing quality (as in FAF) and a richer, deeper
black with the underlying CMY values equal to those of the printed
background. As a result, misregistrations are not visible.
Black Overprint ensures that 100% black text prints cleanly within a tint
or picture area. Occasionally, white lines may appear around black text
and the text may appear less dense than required as a result of
misregistration between color separations. With Black Overprint, the
Pure Black Text / Graphics option is automatically activated and there
are no knock-outs under the black text. However, a knock-out occurs
when you print only the topmost color. This results in less color density
and can cause misregistration if separations are not perfectly aligned.
No
leaves the job as is.
PS Overprint PS Overprint offers the option to use the overprint, which exists in the
PostScript file. It also determines whether the DTP application PS
Overprint settings are honored in the RIP.
Spire CXP6000 color server settings override PS Overprint commands
from DTP applications. For example, if PS Overprint was set to
Yes
in a
DTP application, selecting PS Overprint
No
in the Spire CXP6000 color
server results in no overprinting. The Spire CXP6000 color server can
not create PS Overprint that is not predefined in the file. Selecting PS
Overprint
Yes
for a file that has not had overprinting defined in a DTP
application does not result in overprinting.
Yes
(default) instructs the RIP to use the overprint information that
exists in the input PostScript file. Also, if PS Overprint is applied in a
DTP applications, it is implemented by the Spire CXP6000 color server.
Background colors are not knocked out.
For example, in the case of a yellow triangle overlapping a cyan circle,
selecting
Yes
results in the overlapping area turning green. This is not
seen on the screen, only in print.
No
ignores the overprint information that exists in the input PostScript
file. Background colors are knocked out and only the top most color
parts are seen on the screen in your DTP application.
For example, in the case of a yellow triangle overlapping a cyan circle,
selecting
No
results in the cyan background being knocked out, so only
the yellow is printed.
Table 4: PPD parameters
PPD Parameter Printing Options