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104
Calibration
Color Calibration Method
One of the most important issues in obtaining satisfactory print
quality is steady toner density. Toner density is affected by many
factors such as heat, humidity, and service settings. You should
perform calibration every 24 hours to compensate for these
factors.
The calibration process corrects the printer colors by measuring
their density and creating calibration look-up tables. The IC-301
print controller uses the data in these tables to compensate for the
differences between the actual, measured density level and the
target level, the target density.
You should perform calibration in the following instances:
•
When prints show "color casts"
•
After machine maintenance or hardware changes—for
example, replacing a "Charge Coroton"
•
On drastic ambient changes (temperature and humidity)
The IC-301 print controller uses the target calibration method. This
method ensures consistency over time and that the density values
of the printed output do not exceed the predefined density values.
Target calibration enables you to calibrate the bizhub PRO C500
printer according to the following predefined density values:
Table 9: Fixed density values for uncoated paper
Toner
Density value
Cyan
1.35
Magenta
1.365
Yellow
0.934
Black
1.7
Chapter 7– Color Workflow
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