The Color Printing Process as a Well-Optimized System

An informal target used in the development of printing plate systems has been 150-line, 3-97 percent dots. This criterion appears to have evolved with the advance of the Printing Industry, but is, in fact, well grounded in the mechanics and economics of printing, and in the ability of the eye/brain combination to perceive tonal differences and fine detail. The changes in screen ruling with time, are presented for a number of publications, together with information on the way color is used. The present industry average is between 145 and 150 lines per inch, 3 and 97 percent dots are being held. This, combined with press register tolerances, results The changes in screen ruling with time, are presented for a number of publications, together with information on the way color is used. The present industry average is between 145 and 150 lines per inch, 3 and 97 percent dots are being held. This, combined with press register tolerances, results in a process acceptable to the vast majority of viewers.