Xerox Phaser 790, Документация

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22. Using ColorWise Pro Tools
Xerox Phaser 790 22–3
Measurements
Measurement files contain numerical values that correspond to the toner
density produced by the printer when it prints solid cyan, magenta, yellow and
black, and graduated tints of those colors.
To create a measurement file, first print a page of color patches from
ColorWise Pro Tools or from the Control Panel to the printer. Then measure
the patches using either an X-Rite DTP32 densitometer connected to a
computer on the network. The new measurements are automatically
downloaded to the Fiery.
Output profiles and calibration sets
Output profiles and calibration sets define desired calibration results. One or
more output profiles and one or more calibration sets are provided with the
Fiery. When you calibrate the Fiery, you can select the calibration set that
corresponds to the typical printing jobs at your site. This same calibration set
can be associated with one or more output profiles.
Scheduling Calibration
In general, you should calibrate the Fiery at least once a day, depending on
the volume of print jobs. If it is very important to maintain consistent color, or
if the printer is subject to wide fluctuations in temperature or humidity,
calibrate every few hours. To get the best performance, calibrate whenever
there is a noticeable change in print quality.
If you need to split a print job into two or more batches to be printed at
different times, it is especially important to calibrate before printing each
batch. You should also calibrate the Fiery after printer maintenance.
However, because the printer may be less stable immediately after
maintenance, wait until you have printed approximately 50 pages before you
calibrate.
Since printed output from the printer is very sensitive to changes in temperature
and humidity, the printer should not be installed near a window or in direct
sunlight, near a heater or air conditioner. Paper is sensitive to climate changes
as well. It should be stored in a cool, dry, stable environment, and reams
should remain sealed until they are needed.
Print color reference pages, such as the Color Charts (from the Control Panel
or from the Command WorkStation) and the color reference pages included
with the user software. All of these pages include fully saturated color
patches and pale tints of cyan, magenta, yellow and black. Images with skin
tones offer a very good basis for comparison. You can save and compare
pages you printed at different times. If there is a noticeable change in
appearance, you should calibrate the Fiery.
If the solid density patches (100% cyan, magenta, yellow or black) look less
saturated with time, show the pages to your printer service technician to find
out whether adjusting the printer can improve output.