The calculation of color gamuts is often based amounts of colorants. In this article, the second approach has been selected because we believe, provided that a on transforming the colorant boundaries to color space. This method works for ''well behaved '' processes, but in good model of the printing system is available, it leads to the most accurate gamut description. some cases it is necessary to take into account not only these physical boundaries, but also other kinds of boundary surfaces. These additional boundaries are introduced TERMINOLOGY here for 3-ink and 4-ink processes and are called natural A printer model is a mathematical expression from colorand hybrid boundaries. Examples of print processes for ant space to color space that relates color values in funcwhich these different kinds of boundaries should be taken tion of colorant values. Due to physical restrictions, the into account are given for the Neugebauer and localized domain of the printer model is limited. In this article we Neugebauer model. Finally, an analytical approach is assume that there is a limitation per colorant from 0presented for the calculation of color gamuts of ''well 100%. The domain of the physically achievable colorant behaved'' processes based on the Neugebauer model.
values is called the colorant domain. The region obtained