1 The current situation and problems of color mixing in printing
1.1 The current situation of color mixing
The situation of domestic printing enterprises in recent years With rapid development, although the level of printing and coloring has improved, there are still some common problems in the printing process. Printing and coloring are still dominated by highly paid color masters. Personal coloring experience determines the company’s printing and coloring level, which plays a key role in the on-time delivery of printed products and the accuracy of printing colors.
1.2 Problems
1.2.1 Printing and coloring are done many times ． Normal delivery of printed products cannot be guaranteed. Printing by domestic printing and dyeing enterprises is divided into paint printing and dye printing. The printing production process is complex and long, involving many links. Repeating samples takes more time. During production, it is found that the printing color is inaccurate and needs to be repaired and adjusted. Most of the printing process requires repeated and ineffective work, which wastes a lot of precious production time. There are also other factors. It will also increase the waste of time. This vicious cycle will make the printing delivery time less and less. Even if the delivery can be made, there are still many hidden dangers.
1.2.2 The printing color of bulk goods may vary. Due to the long printing process and many links, there are many factors that affect color, resulting in poor color accuracy. In addition, the color mixing level or color management is not in place, making it impossible for color mixing technicians to correct these deviations, resulting in printing color differences or hidden printing quality problems.
1.2.3 Lack of high-level printing and coloring technical talents and coloring management talents, printing technology and printing and coloring technology Disjointed, mutually restrictive, unable to improve.
2 Analysis of the current situation of printing and color matching
2.1 There are some problems in the printing process Instability, the printing process has physical and chemical processes, and some processes are tangible. As long as the management is in place and analysis is carried out, the problem can basically be solved. However, in the chemical process, only the results can be seen and can only be controlled by dyeing and finishing professional technicians, which requires certain experience and theoretical support. Most printing and coloring personnel work long hours and have rich experience, but their professional knowledge is not comprehensive and they cannot control these unstable factors. They can only judge by testing colors many times.
2.2 Printing and color matching technology management is very important, which is reflected in the accuracy of printing measurement, such as printing, steaming, The operation, temperature, vehicle speed, time, printing scraper pressure, scraper specifications, accuracy of the printing cloth itself, accuracy of the formula, etc. in the processes such as baking, washing, and post-printing finishing, etc., any error in any factor will lead to inaccurate printing colors. If we manage printing and color matching technology as a system, many unstable factors can be solved. Some printing companies add printing materials based on estimates based on personal experience and some wrong habits in order to speed up printing. This makes it difficult to ensure color accuracy and technical improvement as well as analysis of printing problems.
2.3 The printing process is not scientifically managed, resulting in continuous printing quality problems. Even if there is a printing quality problem, I don’t know why. Don’t even know how to solve it. Printing technicians are in a precarious position in the enterprise. There is no sense of achievement and serious turnover. It is difficult to improve the level of printing technology.
3 Strategies to improve printing and color matching levels
3.1 Printing and dyeing enterprises have Printing and dyeing. It is necessary to change the view of emphasizing dyeing and neglecting printing. Pay attention to the training and use of printing and color mixing talents. Only in this way can the development of printing and color matching technology be steadily improved.
3.2 Strengthen the basic management of printing and color matching:
3.2.1 Measurement work must be implemented, especially color matching and In the weighing process, operating accuracy is very important, otherwise improving the level of printing and color matching is empty talk.
3.2.2 Standardization of printing formula management. Recorded technical data must be accurate and accurate.
3.2.3 The printing formula should be adjusted by technical personnel first, and then the materials should be weighed to prevent the data from being adjusted after adding materials for testing. This can easily cause printing and color matching to go astray, wasting a lot of manpower, material and financial resources. Increase printing costs.
3.3 Printing color matching and printing technology are highly unified. The overall technical level of printing has been greatly improved.
3.4 Strengthen exchanges on printing and color matching technology. Prevent technical conservatism, facilitate the improvement of color mixing technology, and ensure the improvement of printing quality.
4 Printing and color matching technology training is to improve printing
4.1 Printing Basic requirements for colorists
The human eye’s sensitivity to color reaches the PPM level, which means that slight differences can be distinguished. So you can adjust the color very closely during color grading. If the printing and coloring personnel are to be tested for color sensitivity. Equip colorists with advanced color discrimination capabilities. Next, we will increase the coloring theory and operational training, so that the coloring level will improve quickly.
4.2 Color mixing theory training
The most basic knowledge of printing and dyeing disciplines Knowledge, such as fiber, cloth, dyes, surfactants, dyeing process theory, light and color, color matching theory, etc.; color mixing operation knowledge, such as basic single color samples, same color single color conversion, color mixing schematic color training, etc. ． Proficient in the hue, shading, strength, coloring performance, etc. of dyes, so as to describe colors in words, such as hue, light, medium, dark, fresh, shading yellowish, reddish, blueish, and quantify color differences; adjust Knowledge of color techniques, such as direction, strength, color light, color change, etc., essential printing knowledge. Color mixing techniques must be accurate and fast. Improve printing production efficiency.
4.3 Printing and color matching have something in common with playing billiardsSame point
Print color matching is extremely complicated, but it is similar to playing billiards. The first goal of playing billiards is to make the ball hit as close as possible to the target. As long as the direction and strength of the second shot are mastered, it is possible to get into the hole, but it is difficult. If the second shot cannot be scored, it will lay the foundation for the third shot. The third shot will be successful if it is fine-tuned based on the second shot. Printing color matching is first given a standard color, and the colorist gives the first color based on reference samples or experience. After the first color matching, the first color is comprehensively considered towards the standard color target and then the second color is given. The color of the second color may pass , but if it still fails, then a third party will be issued for the standard color. After color matching, 85% to 90% can reach the standard color.
4.4 Efficient training on printing and coloring skills
4.4.1 Color Stereoscopic training
First. To find out a number of representative printing colors, the printing formula must be accurate, there must be certain technical difficulties, and the printing varieties must be complete, allowing all colorists to analyze them; secondly, let the colorists identify these colors of red, yellow, blue, and gray For example, we often use printing formulas to identify the proportions of red, yellow, blue, and gray in units of 1,000; finally, let the colorist write down the printing formula by looking at the color without looking at the formula. Accuracy and likelihood analysis are then performed.
Adopt color stereoscopic training. In a short period of time, the level of color correction will be greatly improved, but it will be unstable.
4.4.2 Strengthening color mixing technology skills
Use unproduced Ask the colorist to give the first color sample of the printing color. After color mixing, adjust it against the standard color and give the second color sample. Then compare it with the standard color and give it to a third party to meet the color requirements. This kind of intensive training only takes a short time, but the color adjustment level is relatively stable, and the effect of adjusting the printing color difference is very obvious, and the final color adjustment is fast and accurate.
5 Conclusion
Printing and color matching technology is a relatively complex technical system. It is necessary to solve the corresponding technical and management problems from the occurrence of printing and color matching problems to the improvement and improvement. At the same time, we should also do a good job in the management of people, dyes, printing machines, printing customers, etc., and find out the corresponding rules, so that Printing and color matching technology will be greatly improved, thus promoting the development of printing products to high-end, high-quality, and high-efficiency delivery, and improving the economic benefits of the printing industry.
The last four points to summarize are:
(1) The management and training of printing and coloring technicians are to make printing and coloring The basic guarantee for the gradual improvement of color technology level;
(2) Timely analysis and summary of printing color difference and printing quality problems. It is conducive to improving the level of printing and coloring;
(3) Strengthening technical exchanges among printing and coloring personnel so that printing and coloring personnel have more comprehensive printing knowledge;
(4) Make full use of computer printing color management and give full play to the subjective initiative of colorists. </p
