One-Dimensional, Two-Dimensional, and Spot-Color Management and Control Methods - Control of Color Imaging Systems: Analysis and Design - page 460

(a)

(b)

FIGURE 8.26 (See color insert following page 428.) Examples of Pantone colors repro-
ducible by a digital production printer on a coated stock: (a) top left: 108, top right: 1215,
bottom left: 1255, and bottom right: 135; and (b) top left: 7530, top right: 7546, bottom left:
cool gray 2, and bottom right: warm gray 2.

Many software packages have the ability to enter or create a cyan, magenta,
yellow, and black (CMYK) recipe using multidimensional pro les and store them for

future use or manually edit the recipe. The main problem with this kind of approach
is that the CMYK formula that was originally entered or obtained through manual
entry may not be very accurate at the time of use due to (a) variations in the print
engine state, (b) variability due to operator error associated with manual adjust-
ments cations to CMYK values, and (c) inaccurate recipes (to begin with). If

the recipes are created on a different print engine, then sensor errors, process drift,
and algorithm inaccuracies can lead to error in the recipe with respect to reproducing
spot color. Drift in the print-engine state, which generally occurs, is one of the major

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