Not long ago, everything was simulated, which is also one of the reasons for the decline in quality, so people are very anxious. Later, with the digital pre-press workflow and a series of standardized adjustments and calibrations of the layout machine, the error rate was greatly reduced to a certain extent. The anilox roller and inking system have also been greatly improved. Therefore, these advantages can be used in the subsequent printing process. The current flexographic direct platemaking process is no longer the past era when rubber plates were used, and its product quality is comparable to that of gravure printed matter. In short, after experiencing many difficulties and setbacks in the flexographic direct platemaking technology (for example, the early digital workflow used dot-matrix and jagged images), it gradually abandoned or improved the traditional analog production process. Take us into a new era. What is the so-called "digital flexo" technology? It abandons the film (including a series of corresponding processing procedures such as exposure, development, and fixing), eliminating this simulation process, and replacing it with another simulation process-laser ablation imaging. The principle of laser ablation imaging is: there is a layer of coating on the photosensitive layer of the plate. During plate making, the laser emitted by the laser generator of the plate-making machine directly ablate the coating of the image part, exposing the photosensitive layer below. Then expose the printing plate. In the non-graphic part of the printing plate, due to the coating blocking the light (playing the role of the mask), no photopolymerization will occur, while the photosensitive layer of the graphic part will undergo photopolymerization. To form printed dots. This imaging method is not more "digital" than previous imaging methods. Why do you say that? The reason is that once the digital information is transmitted to the laser, the digital production process of printing and copying is over, and the subsequent work is still analog. This is true regardless of whether you are using film-making or CTP technology. If one simply thinks that "as long as it is digital, it is good", this view and mode of thinking are too one-sided and go to extremes. The advantage of direct plate-making technology is firstly the simulated UV exposure, especially the characteristics of the UV light source. The new plate material used in direct plate-making technology itself does not contain any more digital technology at all. For offset printing, flexo printing or other printing processes, it has never experienced such a major breakthrough as the "computer-to-plate technology". Therefore, it is difficult for others to understand its meaning in such a term. . Like many new things in the past few decades, the new CTP technology does not require much skill, and it is almost "fool-style", which is where it wins. Relevant organizations surveyed several plate-making companies and measured the accuracy and quality of their output films. The results show that the situation of most companies is not optimistic, especially in the high-gloss areas where flexographic printing is most sensitive. Therefore, quality awareness should be strengthened. Because there are various non-standard operations in the traditional process, and the direct plate-making system replaces manual operation with a machine, the performance is more stable, the error is smaller, the error probability is lower, and the quality is more reliable, which is also the advantage of the new process. However, the promotion and application of the new process also requires a process, and exposure calibration is still very important. Next, the second step is to expose the plate with UV plate material. This step can also reduce the drawbacks in the simulation process. As everyone knows, when the traditional ordinary flexographic plate is exposed, the film and the printing plate are not in close contact. The ultraviolet rays must pass through the vacuum layer, the film base, the emulsion layer, and the anti-halation layer. There are more serious scattering and diffusion Due to reflection problems, the resulting dot edges are not smooth, uneven, and uneven in density, and the quality of the final printed product will be correspondingly poor. If the direct plate-making technology is adopted, the above problems will not exist, and its UV light source is more stable, resulting in smaller dots and easier control. High precision is one of the advantages of direct plate-making technology; in addition, most research results have proved that the dots produced by direct plate-making technology are complete in dot type and extremely high-gloss dots are not easy to lose, and also have a small dot expansion rate and order in the printing process. The advantages of length adjustment and large outlets are not blurred. The ordinary printing plate used in the traditional process will have a large dot expansion during the exposure process, but this fact has almost never been heard by people in most discussions.
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