Countermeasures of the hottest offset printing pro

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Countermeasures of offset printing technology in technology and management

offset printing is the most important printing method adopted by domestic printing enterprises today, and it often affects normal production due to various faults in production. In order to avoid this phenomenon, corresponding countermeasures should be taken in daily offset printing production and management. 2. Opinions on several aspects of the operation inspection of the beam of the plastic tensile testing machine can be referred to by colleagues in the industry

1. the surface of the printing plate cylinder should be coated with chromium and nickel

four color Heidelberg offset press. If the surface of the printing plate cylinder is coated with zinc or iron, then the zinc or iron will react with the acid in the water bucket solution to rust and oxidize. The cylinder body cannot be close to the liner and the printing plate. If the cylinder surface is soaked in acid for a long time, corrosion and rust will occur. If the printing plate cylinder body is coated with chromium or nickel, the above accidents will not occur

2. The bucket solution should not penetrate the surface of the printing plate cylinder

the machine operator, if the printing plate liner is not replaced in time after it is uneven or damaged, so that the printing plate is uneven on the cylinder, the acidic bucket solution seeps into the surface of the printing plate cylinder, and the acidic bucket solution contacts the surface of the printing plate cylinder, causing corrosion and rust on the surface of the printing plate cylinder, so the printing plate should be close to the liner during plate loading, so that there is no gap between them, In this way, the rise in the price of acidic water can be avoided, and the solution can penetrate into the surface of the printing plate cylinder, so that the printing plate cylinder will not corrode and rust

3. The pH value of the bucket solution is highly acidic

the machine personnel should strictly control the concentration of the bucket solution. In the operation process, the pH value should be controlled between 56.5 on the premise that the pattern is clear, the blank layout is free of greasy, and the layout is not dirty and paste. Because printing in strong acid will produce low printing plate resistance, high ink emulsification value, and ink is not easy to dry, resulting in dirty back, dim ink, not bright, not bright and so on

4. the moisture content of the plate is too large

the machine operator should also strictly control the rise of the impression temperature. Although there is a tendency to increase the heat shrinkage, the surface moisture of the plate is slightly controlled, and the printing plate is not easy to be dirty; Less water control, once affected by the climate or external environment, the printing plate is easy to get dirty, so it is important to master the ink balance

in addition, to measure the level of offset printing technicians, it depends on whether three levels (roller level, water roller level, ink roller level) are achieved

5. strengthen the management of process technology

the above accidents are mainly caused by the fact that the weight of carbon fiber composite products such as processes has decreased by 17%. In terms of management, the water content of the layout and the pH value concentration of the water bucket solution are not well controlled, the management is not in place, and the offset printing machine personnel have caused the accident for human reasons

therefore, we should strengthen the internal process and technology management of enterprises, improve the technical quality of employees and improve the quality of work

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