Canon ColorPASS-Z5000, Color Manual

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1-11 Managing color on the ColorPASS
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The Pure Black Text/Graphics option can be used only when printing
composites, not when printing separations.
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PostScript applications, such as QuarkXPress, may convert elements defined as
RGB = 0, 0, 0 to four-color CMYK black before sending the job to the ColorPASS.
These elements are not affected by the Pure Black Text/Graphics option. See the
application notes for details. Also, black text and line art defined as RGB = 0, 0, 0 in
office applications (such as Microsoft Word) are converted to single-color black
(CMYK = 0%, 0%, 0%, 100%) by the Microsoft PostScript Level 3 driver for
Windows 2000. To print this single-color black at the maximum toner density of the
copier, set the Pure Black Text/Graphics option to On.
Input
black color
Pure Black Text/Graphics
On Off
RGB
Prints 100% black
With the default profile, prints a rich black
using all toners.
CMYK Prints only with black toner, because CMYK
simulations preserve the black channel. The
actual amount of toner used depends on the
current simulation and the calibration state
of the copier.
Spot Prints only with black toner, because spot
color simulations preserve the black channel.
The actual amount of toner used depends on
the current simulation and the calibration
state of the copier.