Xerox DocuColor DocuColor 4, User Manual, Page: 124 / 216

6
92
Gray Balance
The second VISUALCAL page, “Gray Balance,” provides the basis for cal-
culating a “neutral gray balance,” that is, a CMY gray that as closely as pos-
sible matches a pure K (BlacK) gray produced by the printer’s engine. This
page consists of rows of CMY gray patches on a field of gray produced solely
from black. The variables needed to calculate the printer’s most neutral gray
balance are determined by identifying the CMY patch that best matches this
field, and entering its row and column location on the control panel. When
the values have been entered, the printer’s gray balance is recalculated.
Print the Gray Balance page before the Limits calculations are made, so that
the gray field on which the CMY patches appear (on the Limits page) reflect
the new density and luminosity calibration settings.
Calibration cannot be preformed on the printer/copier while WebTools are in
use.
To perform VISUALCAL calibration
From
READY
or
POWER SAVE MODE
, press the
Menu
button
repeatedly to advance to the
VISUALCAL
screen. Press
Item/Enter
.
When the screen displays
PRINT LIMITS
select
YES
and press
Item/Enter
.
Wait for the Limits and 30% Match page to be printed. You will use this
page to reset the printer’s Dry Ink density and luminosity settings.
When the screen displays BLACK START , begin the process of
specifying Low and High values for each of the four Dry Ink colors, and
a value for the 30% Match.
Follow the instructions provided on the Limits and 30% Match page.
Use the
Up
and
Down
arrow buttons to increase or decrease values. To
accept a value press the
Item/Enter
button.
Zero (0) and 9 are unacceptable values for color calibration. If any of the
entered values for any colors are 0 or 9 the Limits and 30% Match page is
reprinted automatically. Re-enter values for all color rows starting with
Black Start.
6.2 Controlling printed color