Canon imagePRESS C800 Series Technical & Service Manual page 49

[4] Calibration Screen
In the left part of the screen the calibration parts that are due are checked. By pressing the "Start
engine calibration routine" button these checked parts are executed. It is possible to (un)check
parts manually, thus overriding the current setting.
In the right part of the screen you can start the Media family calibration. In most cases this
calibration does not have to be done very often.
Edit CMYK curves
With this option you can adjust the CMYK curves per media family and halftone. The settings are
applied for all new jobs. It is also possible to edit the CMYK curve for a specific job. This can de
done in the properties field of the job. Other jobs will remain unaffected.
You can make adjustments separately for C, M, Y and K.
NOTE
When editing the CMYK curves on a system level (not in the properties of the job) you have to
do the adjustment for all halftones of the media family. Very often images and fonts are printed
with a different halftone. If you only change the curve for one halftone differences in colour will
occur between fonts and images.
This is not applicable for changing the curve on a job level.
Quick Auto gradation
The Auto gradation adjustment procedure is a precise calibration of the gradation, density and
colour settings of the printer.
The measurement is done without printing any paper but is considered to be less accurate than
the Full adjustment. We advise not to use this adjustment.
Reset engine calibration curves
It is possible to reset the actual calibration (shading) curves. In the dialogue you have to select the
curve to delete. After deletion you have to perform the calibration again to get the best image
quality.
Trapping presets editor
In-RIP trapping is implemented in the PRISMAsync. It is only applicable for the PDF print path
(APPE) in document printing mode (Not transaction). It is set on job level.
Colour adjustments
Chapter 4 - Using the PRISMAsync 49