During the maintenance of the printing gap of the offset printing press, the maintenance of the blanket should not be underestimated. In fact, small details can greatly extend the service life of the blanket, and it can also increase the quality of the printing product and avoid the printing caused by the blanket. Quality problems.
1. Before the new blanket is on the machine, it must be in accordance with the cutting standard required by the printer. After the new blanket is installed on the machine, it can be cleaned with pumice powder and then cleaned with a cleaning agent, which can effectively remove foreign particles on the surface due to production or transportation. The blanket stretches under tension and roller pressure, so that it must be re-tightened to a suitable degree. Therefore, the new blanket should be pressed for 10 minutes and then stretched again. Otherwise, there will be ghosting in the printed matter, and overprinting is not allowed.
2. In the printing process, paper marks, paper powder, and ink are accumulated on the blanket to form an indentation; the operator must develop the cleaning habit in time, otherwise it will increase the local printing pressure and cause more plastic deformation in the rubber part. . Or a white smear layer of paper is deposited on the rubber and is not easy to clean. At the same time, the use of quick-drying inks, dry oils, and other additives will also cause the rubber layer to harden, cause crystallization, reduce its elasticity and ink absorption, and affect the normal ink transfer of the blanket. In this case, remove the blanket, clean the blanket with gasoline or reducing agent, and then wipe it repeatedly with pumice powder and cleaning agent until the above crystallized body or paper powder is completely removed. The eraser is allowed to dry for a while on cloudy days, allowing it to slowly recover its elasticity and use. When cleaning the blanket, you should use organic solvents that volatilize faster.
1. Before the new blanket is on the machine, it must be in accordance with the cutting standard required by the printer. After the new blanket is installed on the machine, it can be cleaned with pumice powder and then cleaned with a cleaning agent, which can effectively remove foreign particles on the surface due to production or transportation. The blanket stretches under tension and roller pressure, so that it must be re-tightened to a suitable degree. Therefore, the new blanket should be pressed for 10 minutes and then stretched again. Otherwise, there will be ghosting in the printed matter, and overprinting is not allowed.
2. In the printing process, paper marks, paper powder, and ink are accumulated on the blanket to form an indentation; the operator must develop the cleaning habit in time, otherwise it will increase the local printing pressure and cause more plastic deformation in the rubber part. . Or a white smear layer of paper is deposited on the rubber and is not easy to clean. At the same time, the use of quick-drying inks, dry oils, and other additives will also cause the rubber layer to harden, cause crystallization, reduce its elasticity and ink absorption, and affect the normal ink transfer of the blanket. In this case, remove the blanket, clean the blanket with gasoline or reducing agent, and then wipe it repeatedly with pumice powder and cleaning agent until the above crystallized body or paper powder is completely removed. The eraser is allowed to dry for a while on cloudy days, allowing it to slowly recover its elasticity and use. When cleaning the blanket, you should use organic solvents that volatilize faster.
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