Toshiba manual Pure Black Text/Graphics, 11-8 GA-1121 Color Management, Off

11-8

GA-1121 Color Management

NOTE: The rendering styles associated with the PCL driver do not match those associated with the PostScript driver.

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 colors 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 copier/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 color spaces.

NOTE: Use the Pure Black Text/Graphics option only when printing composites, not when printing separations.

Input		Pure Black Text/Graphics
black color	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/printer.
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/printer.

NOTE: 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 GA-1121. These elements are not affected by the Pure Black Text/Graphics option. For details,