HP Color LaserJet 4550 printer family - Software Technical Reference

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HP Color LaserJet 4550 Software Technical Reference 210
• ColorSmart II optimizes the rendition of text, graphics and images automatically
• Industry standard sRGB default color space for effortless color matching
• Automatic PANTONE®* Calibration for easy use of PANTONE®* calibrated colors
• Color tables crafted to provide smooth, accurate rendition of all printable colors.
sRGB color workspace standard
sRGB is a world-wide color standard (IEC 61966-2-1) originally developed by HP and Microsoft as a common
color language for monitors, input devices (scanners, digital cameras) and output devices (inkjet printers, laser
printers, plotters). It is the default color space used for HP peripherals, Microsoft Operating Systems, the
Worldwide Web, and most office software sold today. sRGB is representative of the typical Windows PC monitor
today and the convergence standard for High Definition TV.
ColorSmart II
ColorSmart II is a set of technologies that enables optimal color output automatically for diverse types of
documents. ColorSmart II utilizes object tagging and sRGB color technologies. Object tagging allows optimal
color and halftone settings to be used for different objects on a page (text, graphics and images). The printer
analyzes the page (what objects it contains) and intelligently uses the halftone and color settings that provide the
best print quality for each object. Object tagging, combined with optimized default settings, produces great color
automatically. For more information on ColorSmart II, see HP ColorSmart II in chapter 4 of the online user guide.
Features for CMYK color control (PS driver)
Cyan, magenta, yellow and black (CMYK) are the inks used by a printing press. It is often called four-color
printing. CMYK data files are typically used by and originate from graphic arts (printing and publishing)
environments. The HP Color LaserJet 4550 series printer is optimized to print RGB colors for a good match to
the screen, but will also accept CMYK colors through the PS printer driver. By default, the HP Color LaserJet
4550 series printer interprets CMYK data according to the Specification for Web Offset Publications (SWOP)
standard. This standard defines process control points for CMYK inks to achieve common color output.
Emulations for Dainippon Ink and Chemical ink sets (DIC) and Euroscale CMYK inks used in the Far East and
Europe, respectively, are also available and can be selected from the printer driver. Detailed Descriptions of each
option are given below.
CMYK ink emulation options
• FAST or SWOP - Generates color according to the Specification for Web Offset Publications (SWOP) as
defined by ISO Type 1 printing (TR001). This is the only CMYK color set with a fixed color definition and is
the most prevalent color set used in North America. This is the default value for press emulation that is used
with the PS driver CMYK data. The SWOP CMYK Inkset setting applies a more strict emulation of the SWOP
colors than the FAST CMYK Inkset setting.
• Euroscale - Generates color according to the norm for European printing as defined by the Dupont Cromalin
proofing system. This color set is frequently encountered in Europe. These colors tend to be more saturated
than the same data printed with the SWOP setting.
• DIC - Generates colors according to the norm for Asia as defined by Dainippon Ink and Chemical Company.
This color set is frequently encountered in Asia. These colors tend to be more saturated than even the
Euroscale colors.
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2. PRINTING PANTONE®* COLORS
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