Eight Factors Affecting The Printing Quality Of Color Box
1.The influence of film on the printing quality of color box The developing and fixing process of film film after exposure is directly related to the clarity and contrast of image on film. Therefore, to plate film, the key to see the density of graphics and text parts and non-graphics and text parts of the contrast. The higher the density and the greater the contrast, the better the quality of the plate making film, and the printing quality of the plate made by it can be guaranteed. In addition, plate-making film base thickness also has an impact on plate-making quality, generally thin film is better than thick film. 2.The influence of printing plate on the printing quality of color box In the process of exposure, light source intensity, light source and plate distance, as well as the length of exposure time will affect the quality of exposure. The light source is strong, the distance is short, the exposure time is relatively short, the light source is weak, the distance is long, the exposure time is relatively long. In a certain light source and distance, with the increase of exposure time, plate visible part of the drug film decomposition, increase, until the drug film surface completely decomposed. If the exposure time continues to grow, not visible part of the surface of the drug film due to the role of strong light radiation, sensitive drug film also began to gradually decompose, so as to make the printing plate text lines will become thin, or even broken, die. If the exposure time is not enough, the non-picture and text part of the visible drug film surface is not completely decomposed, the printing plate developed after the non-picture and text part of the drug film, the machine will be dirty when printing. In addition, different brands of printing plate exposure time required is not the same, this must be of concern. In addition, in the printing vacuum, film and printing plate close to the effect of print quality, if the paste is not true, the printing plate may have double vision, ambiguity and so on. 3.The influence of development on the printing quality of color box 3.1 Developer concentration If the developer concentration is too high and the developer develops too fast, it is easy to cause the printing plate to develop excessively, the picture and text lines become thin, the fine dot is lost or the picture and text is thin and unclear, which will affect the printing quality of the color box; if the developer concentration is too small, the surface of the medicine film which is decomposed by visible light is not easy to clean, easy Dirty Plate for machine printing. 3.2 Development time The development time is too long, the printing plate is not visible light of the drug film surface is easy to be dissolved, the printing plate and text will become light, thin, resulting in printing imprinting is not true, not clear; the development time is too short, see light decomposition of the drug film surface is not easy to completely clear, easy...