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110 Using color
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Four-color printing (CMYK)
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 PostScript printer driver.
By default, the HP Color LaserJet 4550 series printer interprets
CMYK data according to the Standard Web Offset Press (SWOP)
standard. This standard defines how a particular set of CMYK inks
should behave. The printer performs a SWOP color map and internal
half-tones to emulate a SWOP CMYK press. Emulations for
Dainippon Press (DIC) and Euro-standard CMYK inks used in the
Far East and Europe are also available, and can be selected from the
printer driver.