HP 4550 HP Color LaserJet 4550 printer family - User Guide - Page 114

Note Some of the PANTONE®* colors will not match exactly. There are over 945 PANTONE®* colors in the PANTONE®* Matching System. These colors were created using sixteen inks on a lithographic printing press. Not all of these colors are reproducible by a laser color printer because they are out of a laser printer's 4-color range (gamut). PANTONE®* calibrates HP printers to provide the closest match for all the colors we can reproduce and provide the colors closest to those we cannot reproduce. This feature requires the use of the PostScript 3 Emulation printer driver. It utilizes a function in the PostScript language for describing custom colors like PANTONE®* that is unique to PostScript and not present in the PCL data stream. PANTONE®* colors are used mostly in publishing environments by applications such as QuarkXpress and Adobe InDesign that tend to use PostScript only. 114 Using color EN