Packaging box printing produced by Shandong printing factory is favored by packaging users for its high-grade, exquisite and beautiful appearance. Therefore, customers also attach great importance to the printing quality of the packaging box. So, how does Shandong printing factory control the printing quality of color box? Today, Xiaobian brings you fresh dry goods to share with you!
1、 The influence of printing on the printing quality of packing case. In the printing process, the intensity of the light source, the distance between the light source and the plate, and the length of exposure time will affect the printing quality. Strong light source, short distance, relatively short exposure time; weak light source, long distance, relatively long exposure time. Under a certain light source and distance, with the increase of exposure time, the decomposition of the film in the visible part of the plate increased until the film surface completely decomposed. If the exposure time continues to increase, the surface edge of the matte film is affected by strong light radiation, and the photosensitive film begins to decompose gradually, making the printed image lines become thinner, even fracture and blur.. In addition, different brands of license plates need different exposure time, which must be paid attention to.
2、 The influence of ink transfer on the printing quality of packing case. The printing process of Shandong printing factory is actually the process of ink transfer. Generally speaking, offset printing ink transfer rate is relatively low, about 38%. The ink transfer rate is about 50% when the printing plate contacts with the blanket after inking, and the ink transfer rate is about 76% when the blanket contacts with the paper. Therefore, the ink transfer rate is very important. Ink adaptability, ink balance, plate, blanket performance, paper, printing press and so on will affect the transfer of ink.
3、 The influence of paper suitability on the printing quality of packing case. The applicability of paper is mainly reflected in smoothness, whiteness and stiffness. Paper with high smoothness needs less ink; paper with poor smoothness needs more ink. In the printing process, different paper needs different amount of ink according to its surface condition. In the same variety, quantity and price, the paper with higher smoothness and whiteness is better than that with lower smoothness and whiteness.
4、 The influence of printing pressure on the printing quality of packing cases in Shandong printing factory. Printing pressure refers to the interaction between plate cylinder and rubber cylinder, rubber cylinder and stamping cylinder, which is the necessary condition for ink transfer. If the printing pressure is too small, the ink is not easy to transfer, the ink is light, and the ink is false; if the printing pressure is too high, the ink volume expands to the non graphic part, which makes the dot increase seriously and the image distortion, and it is easy to reduce the printing resistance of the plate and blanket. Therefore, the mechanical pressure must be adjusted correctly. Different amounts of paper require different printing pressures. Only appropriate printing pressure can ensure the ink color uniformity and thickness.济南印刷厂讲解的内容 更多的内容 请咨询公司官网http://www.xinfengyinshua.cn/