Determination of equivalent-density domain in black compensation implementation for the selected profile

In standard graphic reproduction subtractive system of process inks coverage is observed. For achieving better density (reproduction) range as well higher density, additional black printer is added into printing system. Today graphic arts ISO specification routes defined overall coverage, meaning also black compensation principles. Although theoretical substitution of chromatic part of process inks with black can be very high, practical results can render certain misalignments in neutral as well other tertiar colors, not achieving predicted values. That maintains the demand of additional customization of reproduction for certain images to preserve reproduction quality. A test target proof and soft proof are considered for proposed profiles, as well adequate achieved equivalent densities or lightness.