12 Evaluating color laser printers
Reliable printing in a variety of environmental conditions
The printer delivers uncompromised print quality in a variety of environmental conditions. The
printer features temperature and humidity sensors used to precisely control printing conditions. For
example, the printer is less sensitive to adverse printing environments, such as offices where heating
or air-conditioning is reduced during evening hours.
Improved automatic color calibration
HP continues to refine and improve color calibration. The HP Color LaserJet 5550 uses new
measurement algorithms and methods to achieve even better color stability and repeatability.
A new time-saving feature skips calibration when appropriate, allowing the printer to be available
more quickly. If the fuser is powered off and on quickly (within 20 seconds), calibration is not
needed and will be skipped.
Automatic color calibration and cleaning results in excellent color uniformity and ensures that print
quality will be consistent over time.
Advanced toner formula
The chemically grown toner has small particles that are more uniform and spherical than traditional
manufactured toners. The toner size results in fine detail on printed images, bright saturated colors,
and a good ability to match the screen (sRGB color).
HP Smart printing supplies
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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 organic photoconductor
drum and toner change over time, adjustments are made for minor fluctuations in sensitivity. These
adjustments ensure even, consistent distribution of toner particles.
Vertical in-line architecture
Because the toner is applied directly to the media rather than via an intermediate transfer belt or
drum, text quality is sharper.
Edge enhancements
The edge enhancements available with the HP Color LaserJet 5550 series printer provide precise
edge control, delivering excellent print quality. Edge control has three components: Color REt,
adaptive halftoning, and trapping. These features are designed into the printer through HP
proprietary technologies and do not affect printing speed.
ColorREt
Color REt is a new feature that smoothes edges by intelligently changing the size and position of
the dots that make up the edge of a solid object. It is optimized to work on solid color edges: red,
blue, green, black, and other solid colors. This ability to grow and move dots increases the
apparent resolution well above 600 dpi.
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Using genuine HP supplies ensures availability of all HP printing features.
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