Creo CXP6000 Color Server, Руководство пользователя

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Basic Settings 183
Black Overprint
Occasionally, white lines may appear around black text. The text may
appear less dense than required as a result of misregistration between color
separations.
Black Overprint
is used to ensure that black text prints cleanly
within a tint or picture area. The text appears in a richer, deeper black, with
the underlying CMY values equal to those of the printed background.
A knock-out occurs when you print only the topmost color. This results in
lesser color density and can cause misregistration if separations are not
perfectly aligned. When Black Overprint is active, there are no knock-outs
under the black text. Black Overprint prints text over colored backgrounds
rather than knocking out the background first. As a result, misregistrations
are not visible. It is therefore recommended to use Black Overprint in
order to ensure best results when printing black text and graphics.
¾
To enable black overprint, from the
Black overprint options
, select
Yes
(
Black Overprint
applies only to 100% black).
Note: Selecting No increases the processing speed.