1. The image is hazy and the blank part is not clean. To solve this problem, the glass of the plate-making machine must be kept clean first. To clean it with alcohol, wipe both sides. The transparency of the work is not enough, the amount of light penetration will be affected, and the printed version will be blurred. If the film plate and glass plate are not tightly attached, it will also cause sun filter. Sometimes a film base is used for a long time, and there is a lot of residual glue left on the tape paper, the transparency will be affected, and the film and the film base are not so tightly attached, so the film base will be replaced after a long time. . During imposition, if two images overlap, the image is also unrealistic. If the leather cloth is used for a long time, it will cause aging, there will be a small amount of air leakage at some edges, the PS version and the film will not stick tightly, and the pictures and photos will be false. If the machine is used for a long time, check if the vacuum of the air pump is enough. If the lamp is used for too long, the cutting rate will decrease and the exposure will be insufficient. When inhaling, if you can't gradually walk from the middle to the surroundings, it will cause local bubbles, and the PS version will be partially blurred. This is to check the bottom pad.
2. The PS version of the outlet is not real. To solve this problem, check from the film. The dots on the film used for printing must have sufficient blackness. The dot structure on the printing plate should be transferred to the printing plate. The covered part (dots) must never be allowed to pass through the amount of light, causing the photosensitive layer of the printing plate to become photosensitive. Otherwise, the dots on the printing plate will not be solid, and the dots will fall off during printing. The dots are hazy, we know that the absolutely clear dots, the transition from the transparent plane to the cladding with high blackness is very steep, it is abrupt, and the edge of the dots actually rises vertically. In contrast, the halo dots, the blackness gradually increases from the edge. So the dots produce an edge with a larger or smaller slope. Dummy virtual dots on the printing plate lead to color deviation due to their unstable performance, and it is often seen that "small dot loss" occurs on the printing plate. To solve this problem, the film before printing should be strictly inspected, and the dots should have sufficient blackness and clear edges.
3. Cannot reflect the subtle parts of the work. Like a strand of hair, there is in the photo, and the printing plate becomes blurred. This is mainly due to the lack of exposure or the excessive concentration of the potion when processing the plate, and the details are washed away.
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