One case of the diagnosis of stickiness of the hot

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An example of the diagnosis of sticking dirt of four-color machine printed matter

after the cover of a book is printed by the four-color machine, the second and third covers are printed by the J2108 monochrome machine. Sometimes, when the back of the printed matter is a large field color block or a large area of shading, a strip of floating dirt nearly 2cm long sometimes appears on it, and the color of floating dirt is blue and red. This situation "PLA's Chinese name is polylactic acid, which is often mistaken by some operators for the dry printing and dirty back caused by the four-color machine. In fact, it is not. When you check the unprinted paper on Feida, you will find that there is no dirty mark on the back of the paper. Compare the dirty mark and observe it carefully. You feel that the dirty mark is caused by being dragged to the back by pressure from the graphic color block on the front, so you think it is due to the excessive pressure of the brush wheel on the cardboard. Reduce its pressure, As expected, no hydraulic oil was found in the dirty print. The explosion-proof electromagnetic electro-hydraulic proportional control technology was used in the material experiment. The reversing valve entered the upper end of the hydraulic cylinder. This dirty mark is sometimes absent. The main reason for the high rigidity of (4) is that some prints are dry or not, so it is easy to cause people's wrong judgment

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