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Chapter 7

Color Calibration
Output from color print devices is subject to changes in temperature and
humidity, and is prone to drift over time, with a resulting loss in color
predictability. Where color accuracy and consistency are crucial, regular
calibration of the KX-P8420 is necessary. The color output of your
KX-P8420 color printer is adjusted using three different methods: Bias
Adjustment, VisualCal, and ColorWise Color Adjustment.
•Bias Adjustment
Used to adjust the overall color density. The overall density is changed
slightly as the number of printed pages increases. If you think color output
has become too dark or too bright compared to previously printed pages,
perform the Bias Adjustment.
It is also recommended that you perform the Bias Adjustment after
replacing the color imaging unit and/or the toner cartridge(s).
•VisualCal
Used to optimize the printer’s range of color density and to adjust gray
balance. If you think the gray color in a printed image does not appear to
be a pure gray, perform the VisualCal after performing the Bias
Adjustment.
•Color Adjustment
Used to adjust the overall brightness of color output and saturation of
each color. Perform the Color Adjustment after the Bias Adjustment and
VisualCal calibration to adjust color output to your preference.
The following sections describe how to use these methods to adjust the
color production of your printer.