Development of Color Control System for Offset Printing Press

摘要

In the process of printing, the most important job of producing color is matching an aim color. So, we have developed a printing color control system with a spectro-measurement sensor and ink control, which considers the characteristics of the printing machine. The error of the spectro-measurement sensor is less than 0.1#DELTA#E and its efficiency of color control is less than 2.0#DELTA#E, minimizing the deviation between an aim color and a measurement color. This paper gives an outline of measuring system and flow of ink control1 as well as accuracy of this system, which is confirmed with the MITSUBISHI DAIYA-3H sheet-feed printing machine.