14 Evaluating color laser printers
Consistent and intelligent color control
The following technologies intelligently control color to deliver reliable and consistent color printing
throughout the printer’s life. You can use the print driver to optimize the printing process so that
even when printing on specialty papers or in adverse environmental conditions you will achieve
high-quality results.
Color calibration Color calibration and cleaning results in excellent color uniformity and ensures that print quality
will be consistent over time. It can be performed automatically or on demand.
Advanced toner formula HP chemically-grown toner formulas are designed together with the HP Color LaserJet printer.
The uniform size and spherical shape of HP toner particles ensures precise control and
placement and reliable performance
Color selection options sRGB (standard red-green-blue), the printer’s default color table, is optimized to produce the best
color appearance match between a page viewed on a monitor and that same page printed and
viewed in a typical office environment. sRGB is an industry color standard originally developed
by HP and Microsoft, and is designed to work very well with monitors, input devices, and output
devices to produce pleasing, accurate colors.
You may choose to select the Vivid or Device color tables. The Vivid setting provides an
increased saturation of text and graphics, and the Device setting provides direct access to the
entire printing gamut for custom solutions.
Industry-leading image enhancements
HP’s industry-leading image enhancements deliver excellent tone scale, text sharpness, and line
clarity without any user intervention. To produce the most satisfying color rendering, the printer uses
a remarkably broad color gamut, sRGB default color tables that meet viewer expectations, and
system-optimization for different paper types.
Edge enhancement technologies
Edge control is comprised of two components: adaptive halftoning and trapping. Both of these
components affect edges and near-edges. Adaptive halftoning increases the edge smoothness of
text and graphics while maintaining the quality of area fills. Adaptive halftoning provides smooth
color and accurate, crisp edges by locating and increasing the digital halftone frequency at edges.
To generate a color image, four color planes must be printed: cyan, magenta, yellow, and black.
Trapping is the deliberate overlapping of one color to an adjacent color to reduce the effect of
color plane misregistration.
Included in the trapping component is halo reduction. Halo reduction makes the subordinate colors
recede from the edge of the dominant color. For example, a process black line would be made up
of black, the dominant color, and cyan and magenta, the subordinate colors. The cyan and
magenta near the edge of the black line are reduced or removed. This prevents color from being
seen on the edge of the black line.
HP Smart printing supplies
HP Smart printing supplies include technology that adjusts the electrophotographic voltages of the
print cartridges throughout the stages of their life. As the properties of the imaging drum and toner
change over time, adjustments are made for minor fluctuations in sensitivity. These adjustments
ensure even, consistent distribution of toner particles.
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Using genuine HP supplies ensures availability of all HP printing features.
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