When printing companies introduce color management technology to output devices such as traditional printers, printers, digital proofers, etc., the problem they face is how to generate the color profile of the traditional printing machine, and then generate color characteristics Before the file, it is necessary to print the IT8.7 / 3 color guide to generate the ICC Profile that provides data and data to the color management system application.
When printing IT8.7 / 3 color guides, you must first confirm the stability of the output device, that is, you must perform calibration of the device (Calibration), and the calibration of the printing machine (Calibration) is to enable the device to The color process with stable quality is indeed displayed, that is to say, the color produced by the device can be stable and consistent. This step is to ensure the accuracy of the ICCProfile color profile described in the future and conform to the ICC International Color Organization. Color management standards.
In order for printing equipment and other equipment to print standard IT8.7 / 3 color guides, it is necessary to standardize the printing operating system, so that the printed products can obtain the same printing control data data (such as full plate density) under the same production conditions. Value, network expansion, highlight, midtone, shadow concentration, etc.). Basically, you should pay attention to the following four points:
1. Four-color printing ink SID full version density value.
2. Dot-Gain dot expansion value of four-color printing ink.
3. Gray balance control
4. TAC total ink volume control
Since the control standard data in the printing process will vary with the characteristics of the printing materials (such as paper, ink, etc.) used by the manufacturer, it is recommended that each printing plant should control the printing process according to its own and customer requirements To establish basic printing quality control data, the printing quality control standard data provided in Table 1 below uses the US GRACol standard as a reference basis. Of course, for manufacturers applying commercial rotary machines, the US SWOP printing standard can be used as a reference standard.
The standardization of printing operating systems inside printing factories has long been a problem that manufacturers have a headache and difficult to solve. Regarding this problem, the industry can seek the assistance of the printing industry technology research center, and the current domestic research and development of printing quality control technology, It can be said that it is completely led and executed by the Printing Industry Technology Research Center supported by the Technology Department of the Ministry of Economic Affairs. After years of research efforts, it has successively completed the development of software such as control guide tables, test samples, ColorWiser print quality management diagnostic systems, etc. The main purpose of this system is to control and analyze the printing quality by computer, and provide high-efficiency, practical and convenient printing quality control tools, mainly for full-page density, stacking ability, gray balance, dot swelling, and ink-ink balance , Printing registration, creep printing, printing resolution and other eight common problems are analyzed and controlled to diagnose color quality problems. In addition to effectively assisting manufacturers to solve and improve the current printing color quality, for today Full digital control of the process It can be said that China's printing industry is stepping into the cornerstone of digital color quality control.
Therefore, in order to achieve the goal of color management, the industry should pay special attention to the fact that it should establish a standardized operating process and possess and use printing quality control tools, so that the control of the color quality of the printed matter can be sure, so that the basic printing control data Maintain within a certain range, so as to have the foundation and qualification to import color management systems and technologies to achieve a multiplier effect, otherwise it is necessary to establish that the color of the digital proofing in the factory is consistent with the traditional printing color, which will be unpredictable. Unrealistic ideas.
So as long as you can grasp this principle, color management can still achieve a similar effect between different output media in the traditional process.
Conclusion
In today's vigorous development of printing digital automation technology, in addition to greatly improving the production efficiency of the industry, for high-quality printing that requires color accuracy and meticulousness, it will be an important milestone for the future industry in the market, and the technology to control the color quality of printing It will be the best competitive weapon for domestic printing companies in the domestic and foreign markets, and it is also the brand recognition of printing companies in the industry. Therefore, in response to the advent of the digital era and the promotion of their own printing technology upgrades, the manufacturers will focus on R & D technology in printing The application of quality control and digital color management is technically a correct and necessary way.
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