The development of high-fidelity color printing technology is a long way to go

High-fidelity color printing, with color separation printing color space and neutral gray brightness range, mapping the color of the visible spectrum color space. Although the high-fidelity printing color space has been much larger than the conventional four-color, there is still a large compression compared to the visible spectrum color space. This is mainly due to the ink properties and the cost-effectiveness of controlling high-fidelity printing products, and the reason why more basic color inks cannot be selected. Under such conditions, how to control the high-fidelity printing color hue, tone characteristics, and ratio of color components to neutral gray components is a key technology for optimizing the visual perception effect of simulated visible spectrum.

At present, it is not difficult to measure the color value of the printed color, but it is difficult to determine the ideal process target value. Mapping the visible spectrum color space with a smaller printed color space does not allow simple proportional compression. A considerable number of colors, when varying in a certain proportion in the visible spectrum color space, are reproduced by changing the same proportion of the ink color, and the visual effect of the printed color will change. In the nearly four decades since the four-color separation technology entered the electronic color separation period, efforts to solve the above problems have not been stopped so far.

Colorimetry is the discipline that studies human color vision law and quantitative measurement theory and technology, and is the theoretical and technical foundation of high-fidelity color printing technology. Visual spectrum color quantification is a statistical method that relies on observations from the human eye. The tristimulus values ​​of the CIE RGB color thus established have become the benchmarks for colorimetric color quantification. It is difficult to accurately describe the spectral characteristics of the color space formed by the printed color. There are many factors that affect the quantitative description, such as the change of the spectral characteristics of the base color ink, the change of the spectral characteristics of the ink overprint color, and the influence of the printing process on the color rendering of the ink. In this sense, describing the spatial characteristics of printed colors is much more complicated than describing the spatial characteristics of the visible spectrum. On the basis of colorology and colorimetry, rational application of statistical methods, summed up the three-dimensional printing color model, and gradually clear the relevant influencing factors of the measurement model, is the only way to continue to improve the quality of printing. All-digital control of the printing process. Its technical foundation is: three-dimensional representation and conversion of color. Its main function should at least include: when the three-dimensional space parameter of spectrum color is converted into the three-dimensional space parameter of printing color, the color point and the color area can be precisely controlled; when the printing process parameter changes, the change of printing color can be pre-measured.

In the new era of rapid development of science and technology induced by computer technology, China has a quite favorable opportunity to make full use of these new theories and technological achievements, to leapfrog over decades of gradual accumulation in the industrial era of developed countries and to directly Leap forward to the world advanced level. The promotion and application of high-fidelity color printing technology in China can enable printing companies to leap into the international forefront in the wave of the rise of the fourth-generation printing technology; it can make printing companies to a certain extent, get rid of the mode of simply relying on equipment updates to improve the level of technology; Can cause printing companies to have a deeper level of thinking on the printing and copying theory, key technology, quality inspection indicators, etc., improve the initiative and management level of technology management; can use new quality and new features of the printing products to help end users to expand product sales Make the printing company more profitable.

Taking the lead in the application of new technologies is not something that every top management can do. It requires considerable innovation and courage. The difference between entrepreneurs and factory managers is this.