Highlights of the LTF Survey of Process Color Inks.

An industry-wide survey with the goal of fuller understanding of lithographic color reproduction problems is reported. A 21-step test color strip printed with production runs by 170 single color, two color, and four color presses is studied for differences which can affect requirements of color correction. Hue purity, gray balance, trapping, additivity, proportionality and other factors are measured as variables to be considered in relating masking to color separation.