As early as the end of the 1990s, it began to enter the production workshop of printing enterprises from the laboratory, which marks the beginning of the printing industry into a new era of colorful printing.
高保真印刷（Hi－Fi Color Printing）是相对于四色印刷而言的，通过在C、M、Y、K四色印刷的根底上添加红、绿、蓝、橘黄等色彩油墨的方法来改进印刷色彩的再现性、真实性。在选用更好的油墨进行印刷时，因为多色的原因，有的四色印刷中的两次色就能够用高保真中的原色来替代，使色彩更丰满。跟着人们对美好生活寻求的不断进步，对印刷品质量的要求也越来越高，现在高保真印刷技能已越来越多地被印刷企业所使用。因为对五颜六色图像印刷而言，除了高保真印刷技能，还没有其他技能能够真正扩展图像的印刷色域，使图像色彩愈加亮堂艳丽，更挨近自然界真实景象的观看作用，到达高的印刷质量水平。
High-fidelity printing (Hi-Fi Color Printing) is relative to four-color printing. It improves the reproducibility and authenticity of printing color by adding red, green, blue, orange and other color ink on the basis of C, M, Y and K four-color printing. When selecting better ink for printing, because of multi-color reasons, some two colors in four-color printing can be replaced by the original color in high fidelity to make the color fuller. With the continuous progress of people's pursuit of a better life, the requirement for printing quality is also getting higher and higher. Nowadays, high-fidelity printing skills have been increasingly used by printing enterprises. For colorful image printing, in addition to high-fidelity printing skills, there is no other skill that can really expand the color gamut of the image printing, make the color of the image more brilliant, more close to the viewing effect of the real scene in nature, and reach the highest level of printing quality.
Ji'nan calendar printing
High-fidelity color separation technology is the foundation of high-fidelity printing and the key guarantee of printing quality. Because high-fidelity printing uses more than four-color ink to copy the original, the conventional color separation method is no longer suitable. After selecting high fidelity printing technology, the original will be multi-color separation. Detailed chromatic number is determined according to the details of the original manuscript. The characteristic values of ink products from different ink manufacturers are different, and the color separation system established by them is also different.
The color separation software can set up different color separation systems according to the needs of products and printing. Now there are six, seven and even more color separation systems. This kind of color separation skill is more messy than four-color separation skill. High-fidelity color separation skill is the center of high-fidelity printing skill. High-fidelity color separation is carried out in CIERGB color space. Input RGB color will achieve brightness and chroma characteristics closer to spectral color. Different base color ink combinations will match different input colors in different color phases. Color parameter.
The setting of color separation channel ensures that the printing color reaches the printing gamut and realizes the step linearity. Compared with four-color printing, high-fidelity printing color does not decrease in brightness due to the improvement of saturation to a certain extent, which can not be achieved by conventional four-color printing base. There are two main types of high fidelity color separation modes known now. One is to set up color separation model in interactive graphical interface represented by ICISS, the other is to set up fixed color separation model in high fidelity color lookup table (CLUTs) represented by Pantone Hexarome.