Blanket as a medium for blotting transfer has a huge impact on the quality of offset printing products. The correct use of blankets has an important role in improving the service life of rubber and ensuring the quality of product printing.
First, the blanket must be washed to keep its surface clean
The principle of offset printing clearly shows whether the blanket can completely transfer the graphic ink layer on the printing plate and evenly transfer it to the surface of the paper. The flatness and elasticity of Chen Ping are better, and the surface of the blanket is kept clean and tight. want. We know that in the high-speed printing process, due to the adhesiveness of the blanket and the “separation work†function of the ink ink layer, the surface of the blanket will inevitably gradually accumulate impurities such as paper dust, fillers and pigments. When the printing surface is poor in strength, the fillers are combined with loose paper, or the ink is printed with inks with coarse particles and large specific gravity and unsuitable viscosity. This can cause miscellaneous layers on the surface of the blanket, affecting the normal wetting. Influencing the transfer of the ink layer, resulting in imprinting defects. Based on this situation, the blanket must be washed frequently in the printing to eliminate the accumulation layer on the surface to achieve uniform ink transfer and print transfer. Under normal circumstances, about 3,000 sheets of cloth are wiped once. However, the actual printing process should be controlled according to the printing effect to ensure the stability of the printing quality.
Second, master the correct cleaning method of blanket
For safe operation and easy cleaning, the machine should be rotated at a low speed, rubbed against the surface of the blanket with a piece of cloth, and then stopped. At this point, the right hand took a small amount of gasoline on a rag, scrubbed the blanket first, letting the ink stains dissolve open, and then use the left hand to hold the dry rag to clear the dirty stains and wipe dry. If the blanket is thicker, wash it again and again, use a cloth to wipe it clean until it is completely removed, and then wipe it clean with a dry cloth. To ensure the integrity and clarity of the newly printed sheet, it is best to apply a layer of talc after the blanket has been cleaned to allow the solvent remaining on the surface to dry. In fact, cleaning the blanket is a meticulous task, both to be neat and clean, but also to operate carefully to ensure the cleaning effect. Gasoline on the cloth can't be scooped up too much at the same time, so as not to get dirty on the plane when it is squeezed. If the oil is too low, the ink will not dissolve and it will be difficult to clean. Therefore, when the dirt on the blanket is scrubbed with gasoline, dry stains are removed with a dry cloth, and the cleaning effect is good.
Third, the use of blankets and maintenance essentials
Offset printing equipment not only prints fine products, but also prints general products. It is necessary to print good quality coated paper, and to print offset paper and whiteboard paper. Therefore, the use of two blankets in each case is effective for ensuring product quality. A new blanket can be used for printing high-end fine products, and an old blanket can be used for printing general products. If the downtime is a bit longer, or before each shift, the blanket must be cleaned. When dry, depending on the degree of fouling, the surface of the blanket is thoroughly scrubbed with pumice powder. For the time being, no blanket is needed. After washing, a layer of talcum powder should be applied, and then wrapped in black paper and placed in a cool place. Avoid heavy pressure. To prevent the blanket aging or compression deformation. In order to avoid rolling the dent out of the blanket, the length of the liner paper should be cut into two to three millimeters each, so that the trailing edge of the liner can form a step-like shape, which is also conducive to the tightening of the inner bag. In order to prevent accidental accidents rolling out the blanket, the feeder and the operator's station must be carefully watched during the printing to prevent the corners, paper bunches, and foreign objects from damaging the blanket through the impression cylinder.
How to Do the Maintenance of Offset Blanket
February 23 05:06:26, 2024
GlazeKing Ceramics TechnologyCo.,Ltd. , https://www.maglazekingceramics.com