Konica Minolta bizhub PRO C6500P - Manual (Page 146)

138 Chapter 7—Color Workflow
Calibration
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-304
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)
Color Calibration Method
The IC-304 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 printer according to
the following predefined density values:
Table 11: Fixed density values for uncoated paper
Toner Density value
Cyan 1.3426
Magenta 1.4669
Yellow 0.9246
Black 1.7603