The investigation of effect of pigment ratio in ink on color gamut

Abstract

Color printing is important for every printing method in the Printing Industry. When it comes to obtaining the right colors, visual beauty and cost factors comes into prominence. In order to reduce the printing cost, it is necessary to obtain the maximum possible number of colors from the mixture of these colors by using less colors and plates. For this purpose, it is tried to reach the widest color gamut that can be reached in printing by interfering with the L*a*b* values of standard CMYK colors or by using additional colors. In the study, offset printing CMYK inks were prepared using mono pigments. Then, the ink pigment ratios were increased by 25% and the obtained inks were printed on 135 g/m2 glossy coated paper. The density values, L*a*b* values of the prints were measured and the ΔE00 differences were calculated. By measuring the color values of the prints, the effect of the inks on the color universe was examined. It has been determined that increasing the pigment ratio has a positive effect on the color gamut.