Rgb Pure Black Process; Cmyk Pure Black Process - Canon IMAGERUNNER C2550 Printer Manual

RGB Pure Black Process

On * , Off
This setting enables you to specify how black and gray data with the equivalent
ratio of R to G to B should be processed when device dependent RGB data is
converted into device dependent CMYK data using the 'RGB Source Profile' of
the machine.
If [On] is selected, black and gray data with the equivalent ratio of R to G to B is
printed using the black (K) toner only, regardless of the selected 'Output Profile'
setting.
If [Off] is selected, black and gray data with the equivalent ratio of R to G to B is
printed using CMYK toners based on the selected 'Output Profile' setting.
IMPORTANT
If you can see gradations or jagged lines in the printouts of black or gray data,
select [Off] in RGB Pure Black Process and select [Normal] for 'Output Profile'.
NOTE
In combination with certain settings, black and gray data with the equivalent ratio of
•
R to G to B may be printed using the black (K) toner only, even if [Off] is selected.
The following are examples.
- When [On] is selected for 'Pure Black Text'
- When [None] is selected for 'RGB Source Profile'
- When [TR Normal] or [TR Photo] is selected for 'Output Profile'
- When 'Prioritize Printing of Lines and Text' in the printer driver is selected
If [None] is selected for 'RGB Source Profile', the RGB Pure Black Process setting
•
is not applied.

CMYK Pure Black Process

On , Off
*
This setting enables you to specify how monochrome data (C=M=Y=0) should be
printed when the device dependent CMYK data is processed using the 'CMYK
Simulation Profile' of the machine.
If [On] is selected, monochrome data (C=M=Y=0) is printed using the black (K)
toner only, regardless of the selected 'Output Profile' setting.
If [Off] is selected, monochrome data (C=M=Y=0) is printed using CMYK toners
based on the selected 'Output Profile' setting.
NOTE
In combination with certain settings, monochrome data (C=M=Y=0) may be printed
•
using the black (K) toner only, even if [Off] is selected. The following are examples.
3-71
PS Settings
3