HP Color LaserJet CM4730 Multifunction Printer series - Manual (Page 159)

Print in four colors — CMYK
Cyan, magenta, yellow, and black (CMYK) are the inks used by a printing press. The process is often
called four-color printing. CMYK data files are typically used by and originate from graphic arts (printing
and publishing) environments. The MFP will accept CMYK colors through the PS printer driver. The
MFP color-rendering of CMYK is designed to provide rich, saturated colors for text and graphics.
ENWW Print in four colors — CMYK 143