
In the process of printing, the intensity of the light source, the distance between the light source and the plate, and the length of the exposure time will affect the quality of the printing. The light source is strong and the distance is short, and the exposure time is relatively short; the light source is weak and the distance is long, and the exposure time is relatively long. Under a certain light source and distance, with the increase of exposure time, the decomposition of the coating film in the exposed part of the plate material intensifies until the exposed coating surface is completely decomposed. If the exposure time continues to increase, the edge of the unseen part of the film surface will gradually decompose due to the radiation of strong light, and the resulting printing plate graphic lines will become thinner, even broken and blurred. The specialty packaging color box factory pointed out that if the exposure time is insufficient, the non-graphic part sees that the photo film surface is not completely decomposed. In addition, different brands of plates require different exposure times, which must be taken into account.
In addition, when the printing plate is vacuumed, the degree of close contact between the film and the printing plate also affects the printing quality. If the sticking is not true, the printed printing plate may have problems such as ghosting and blurring.
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