Ink feeding control based on measured ink density

Printing ink volume control is one of the key factors in the printing process, which decides the printing color and reproduction quality. Printing ink volume is controlled through the console by adjusting ink key opening degree. The only parameter that reflects printing ink volume and general used is solid ink density measurement. According to the ink feed principle of sheeted print machines, a special test sheet was designed and printing test experiments were carried out to search for the relations between ink density and printing ink volume. The function between the ink density and the ink key opening, as well as printing relative contrast and dot gain curve was established by the experiment simply. The results can be used as a mathematical model for automatic printing ink volume control and the experimental method is very useful in practice.