Offset Printing Technology Management Strategy

Offset printing is the most important printing method used by printing companies in China today. In the production process, normal production is often affected by various failures. In order to avoid this kind of phenomenon that affects the efficiency of enterprises, in the daily offset printing production and management, it should take corresponding countermeasures. The following views are available for reference by colleagues in the industry.

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

In the four-color Heidelberg offset press, if the surface of the plate cylinder is coated with zinc or iron, zinc or iron will react with the acid in the fountain solution to rust and oxidize, and the cylinder body cannot cling to the liner and plate. If the surface of the roller is soaked in acid for a long time, it will cause corrosion and rust. If the plate cylinder body is changed to chromium or nickel, the above accident will not occur.

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

The operator of the machine platform, if the plate liner is not evenly lined or damaged, it is not replaced in time, so that the plate is uneven on the roller, and the acidic water fountain solution penetrates the surface of the plate cylinder body. The acidic hopper solution is in contact with the surface of the plate cylinder, causing corrosion of the surface of the plate cylinder. Therefore, when the plate is loaded, the plate is to be closely attached to the gasket so that there is no gap between the plate, so that the acidic water fountain solution can be prevented from permeating the surface of the plate cylinder, and the plate cylinder will not corrode rust.

3. The pH of the water bucket solution is acidic

Machine personnel should strictly control the concentration of the water bucket solution. In the operation process, the PH value should be controlled between 5 and 6.5 under the condition that the pattern is clear, the layout blank is non-greasy, and the layout is not dirty or dirty. Because printing in strong acid, it will produce a printing plate with low printing ink resistance, high ink emulsification value, and the ink is not easy to dry, causing the back surface to be dirty, the ink color to be dull, and not to be bright and not bright.

4. The layout is too much water

Machine operator must strictly control the surface moisture of the printing plate, the moisture control is slightly larger, and the printing plate is not easy to be dirty; the moisture control is less. Once the weather or the external environment is affected, the plate is easy to hang dirty. Therefore, it is very important to master the ink and water balance. important. In addition, to measure the level of offset printing technicians, it depends on whether to do "three flat" (roller flat, water roller flat, ink roller flat).

5. Strengthen process technology management

The above accidents are mainly due to the lack of control of the layout moisture and the pH value of the hopper solution in the process management, and the management is not in place. The accidents are caused by man-made personnel of offset presses. Therefore, it is necessary to strengthen the management of internal process technology, improve the technical quality of employees, and improve the quality of work.