In the printing industry spot color is a definition of color L*a*b*-value. Emulation of spot color is
usually done by printing process inks with various coverage values. The printed result would have the
desired L*a*b* color coordinates. Furthermore, emulated spot color tone-values are subject to
definition of a specific tone-value model. This is as opposed to spot color ink, where the tone-values
are defined simply by printing various coverage values of the ink.
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INC, HP, "MODEL-INDEPENDENT SPOT COLOR TONE-VALUES COVERAGE ESTIMATION", Technical Disclosure Commons, (July 25, 2018)