Color management in the printing process occupies an important position in the entire color management system, because the quality of work at this stage is directly related to the quality of batch products, especially in the field of cigarette label printing with stability as the first requirement. Poor control, ranging from batch scrapping to customer complaints and returns, and the direct impact on their reputation. 1. The importance of data standards The so-called standardization is the maximum degree of standardization. The same process conditions, different locations, different times, and different operating staff to print, the effect should be completely consistent. This requires the measurement and control of process parameters to stabilize the process conditions. This requires us to determine the key processes in the printing process according to the characteristics of our company. All the processes in the printing process must be well controlled to achieve the purpose of professional production. In traditional printing production, employees' thinking is perceptual, empirical, and disorderly, often adopting the method of masters and apprentices to impart skills. In the thinking habits of some teachers, it is always believed that printing production relies on the experience passed on from generation to generation. It is unclear and unclear. If you have more experience, you will know it naturally. In fact, this is an unscientific and rigorous approach. Modern printing requires many steps to complete together, to maximize cost savings, improve production efficiency and ensure stable printing quality, it requires a scientific and strict system and process. The standardization and standardization of enterprises can form strong productivity. A research institute in London, UK has done a lot of long-term data statistics, and concluded that 13 of the economic growth in Europe is due to standardization, which is much higher than the economic drive of patented technology. We must be keenly aware that the rational age of the printing industry has arrived. In recent years, the business strategy alliance formed by a number of printing industry suppliers and academic groups has promoted a unified "job identification format", both by establishing standard "output" and "input" information formats, thereby controlling The effective operation of the production process has become the consensus of "standardization, digitization and standardization" in the industry, and is known as a milestone in the standardization of the printing industry. Standardization is indeed conducive to printing quality control, effectively reducing costs and improving service levels. The printing production process is long and complicated. The control of printing quality lies in the whole process. Any process link is not handled properly, the skill level of the operators in each link is uneven, and the operation is not standardized. It is impossible to produce high-quality printing products. For each production process, set up control points and control elements to control whether the process meets the standard requirements as the basis for the next process. Second, the color data of cigarette pack products For printing companies, while formulating the color quality standards for printed products, the quality standards of the printing materials (ink and paper) must be formulated and effectively controlled to achieve the required print quality. The tolerance range of the color of the printed matter and the paper can adopt the same control standards as the users of the printed matter (cigarette enterprises); or, according to the production conditions of the printing enterprise, relatively strict control standards The standard chromaticity coordinate value of the ink can be the same as the specified target color of the printed product; or, the data obtained by measuring the color sample of the ink obtained after the specified ink is scraped using an automatic ink scraping sample machine, as the The standard color coordinate value of the ink. In this way, the incoming ink does not need to be printed on the machine, and it can be easily detected and controlled. The color difference of the printed product is a comprehensive performance of all influencing factors. Therefore, for the quality control of the incoming ink, a relatively strict qualification tolerance must be formulated Range, so that the printed product obtained after the color difference changes caused by other influencing factors after printing can meet the final quality requirements. Formulation of target color standard chromaticity value Cigarette trademark color quality management can use spectrophotometer and color data processing system. The minimum measurement caliber is 3mm; therefore, the actual measured area of ​​the color measured on the cigarette trademark must be greater than 3mm to make sense; it must be greater than 5mm to facilitate the staff to detect and obtain good repeat accuracy. After the cigarette trademark is wrapped, it will be covered, and will not affect the sizing area, and print 5-8mm diameter detection color blocks for all colors that need to be controlled. Sampling 20 to 100 or more proofing trademarks, after visual observation by the standard-setting department with human eyes, meets the design color requirements and the difference between the proofs within the width of the human eye proofing trademark as a standard color sample. Carry out chromaticity measurement and statistical calculation for each color of the above standard color samples, and calculate the average value of L, a, and b as the standard chromaticity value of the color in the trademark; or use the target color in the color quality control software In the setting function, the average value measurement sets the standard chromaticity value. Repeat the above operations to formulate the target color tolerance range of L, a and b standard chromaticity values ​​for different trademarks and different colors.
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