In the actual printing, it is often encountered that the printing pressure and the paper are the first consideration in the past. When the problem cannot be solved by adjusting the printing pressure, only paper can be changed. However, this not only increases the printing cost, but also delays the production cycle. In the following two examples, we solve this problem by adjusting the printing process. Example 1: in the actual production, we often encounter 30% - 50% magenta and 100% cyan overprint on the blue field. Because the paper is not good, the red screen will often appear, and the problem of using good paper will be solved. Obviously, paper is the main cause of this failure. But can we solve this problem by adjusting the process? Through analysis, the conventional color sequence of printing is black, green, magenta and yellow. ???????????????????. In order to prevent anti stripping, so the viscosity of magenta ink is reduced, and the viscosity of green ink is increased. The problem is still unsolved. Although the effect of using imported ink is better, it is still not ideal. After analysis, because the four-color machine is wet and wet overprint, when overprinting another color ink on the wet field, the transfer effect is relatively poor, and the ink transfer rate is low. Try to change the printing color sequence of magenta and cyan, and print magenta screen first, so that the magenta screen can be 100% transferred to the paper, the transfer rate is the highest, and more than half of the field area of the green plate can also be directly transferred on the paper In this way, the printed matter is really plain, and the problem has been fundamentally solved. Even if the paper with poor quality can be printed. ? example 2: at one time, 150 g / m2 offset paper is used to print the cover of a book, and there is a large area of green print on the page. When looking for the rules, the coated paper is used, which is very plain on the spot. However, when using 150g / m2 offset paper, the field blooming phenomenon is relatively serious, and it is ineffective to increase the printing pressure, which is obviously caused by the rough surface of offset paper and poor ink affinity. ??? because the cyan color is in the second group, the ink affinity of the paper is relatively poor, and the combination with the ink is not strong, so the green ink printed will be peeled off from the latter two groups of blanket. So can single blue ink print plain clothes? We separated the remaining color group of the machine and printed only cyan color. As a result, the printing field was very smooth. So we adjusted the printing color sequence, put the cyan plate in the last group, and eliminated the printing problem. ?? through the troubleshooting of the above two examples, it is found that the printing color sequence has a great influence on the ink transfer, especially for multi-color printing, it is necessary to adjust the printing color sequence flexibly according to different moving parts.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.