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）是相對于四色印刷而言的，通過在C、M、Y、K四色印刷的根底上添加紅、綠、藍、橘黃等色彩油墨的方法來改進印刷色彩的再現性、真實性。在選用更好的油墨進行印刷時，因為多色的原因，有的四色印刷中的兩次色就能夠用高保真中的原色來替代，使色彩更豐滿。跟著人們對美好生活尋求的不斷進步，對印刷品質量的要求也越來越高，現在高保真印刷技能已越來越多地被印刷企業所使用。因為對五顏六色圖像印刷而言，除了高保真印刷技能，還沒有其他技能能夠真正擴展圖像的印刷色域，使圖像色彩愈加亮堂艷麗，更挨近自然界真實景象的觀看作用，到達高的印刷質量水平。

　　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.

　　濟南臺歷印刷

　　Ji'nan calendar printing

　　高保真分色技能是高保真印刷的根底，是印刷質量的要害保證。因為高保真印刷選用多于四色的油墨來仿制原稿，因此常規的分色方法現已不適合。選用高保真印刷工藝后，將對原稿進行多色分色。詳細色數依據原稿的詳細情況確定，不同油墨廠家的油墨產品特性值不同，由此樹立的分色體系也有所差異。

　　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.

　　分色軟件能夠依據產品和印刷的需要樹立不同的分色體系。現在已有六分色、七分色甚更多的分色體系。這種分色技能比四色分色技能更雜亂，高保真分色技能是高保真印刷技能的中心，高保真分色在CIERGB色彩空間中進行，輸入的RGB色彩將取得更挨近光譜色的亮度和色度特性，不同的基色油墨組合別離匹配不同色相區間的輸入色彩色度參數。

　　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.

　　基色油墨分色通道的設置保證印刷色彩到達印刷色域和實現階調線性。與四色印刷比較，高保真印刷色彩在必定程度上并不因為飽和度進步而亮度降低，這是常規四色印刷底子無法做到的。現在已知的高保真分色模式主要有兩類。一類是以ICISS為代表的在交互式圖形界面設置分色模型，另一類是以Pantone Hexarome為代表的高保真色彩查找表（CLUTs）固定分色模型。

　　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.