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1-6
Fiery Colour Management
Pure Black Text/Graphics
The Pure Black Text/Graphics option affects the printout for black text and
vector
graphics
on a page. Under most circumstances, leave this option set to On. When Pure
Black Text/Graphics is on, black colours generated by applications (for example, RGB
= 0, 0, 0; CMYK = 0%, 0%, 0%, 100%; or K = 100%) are printed using the
maximum amount of black toner allowed by the calibration curve. This means the
black text and line art will not exhibit halftone
artifacts
(as long as the printer is
calibrated correctly) and will not be misregistered, since there is only one toner used. In
addition, this setting eliminates
blasting
.
For some jobs, it is preferable to clear this option, for example, if the page includes
gradient
fills that use black. The following table describes the behavior of the Pure
Black Text/Graphics option with black data defined in different colour spaces.
N
OTE
:
Use the Pure Black Text/Graphics option only when printing composites, not
when printing separations.
N
OTE
:
PostScript applications (such as QuarkXPress) may convert elements defined as
RGB = 0, 0, 0 to four-colour CMYK black before sending the job to the
ES3640e MFP. These elements are not affected by the Pure Black Text/Graphics
option. For details, see the application notes. Also, black text and line art defined as
RGB = 0, 0, 0 in office applications (such as Microsoft Word) are converted to single-
colour black (CMYK = 0%, 0%, 0%, 100%) by the Microsoft PostScript Level 3
driver for Windows 2000/XP. To print this single-colour black at the maximum toner
density of the printer, set the Pure Black Text/Graphics option to On.
Input
black
colour
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 printer.
Spot
Prints only with black toner, because spot colour
simulations preserve the black channel. The actual
amount of toner used depends on the current
simulation and the calibration state of the printer.
