The quality of blankets directly affects the quality of offset printing, and improper use or poor storage of good quality blankets will also affect the service life. Therefore, it is very important how to properly use and keep the blanket properly. 1. Use of blanket When cutting a new blanket, the marking direction of the blanket should be consistent with the vertical direction of the roller axis, otherwise it will change the elongation, thickness and firmness of the blanket, reduce the service life and affect the product quality. When cutting, the drag and the bite cutting line must be parallel, and the force will be uniform after tightening, otherwise it will cause uneven pressure, unclear dots, and even the liner will wrinkle. The pad of the blanket must be narrower than the blanket, so that when the blanket is tightened, the two sides of the blanket can be tightly wrapped on the surface of the drum to prevent foreign substances such as impurities, oil, washing liquid, water from entering the edge and causing the surface of the drum Oxidation rust and blanching of blanket delamination. When tightening the blanket, pay attention to eliminate the influence of the friction resistance on the back. You can not only pull the end of the drag slightly, but should add tension on both ends. . After the new blanket is installed, there is a smooth anti-oxidation film on the surface of the blanket, which must be washed with pumice powder dipped in gasoline or kerosene to maintain the good ink absorption of the blanket. In daily printing, the blanket must be cleaned carefully, and do not allow ink to remain in the pores on the surface of the blanket, otherwise it will oxidize and dry the fixed film over a long time, reducing the ability to absorb ink. The conjunctiva on the surface of the blanket can be cleaned with clean water first, then wiped with gasoline or kerosene dipped in pumice powder, or with a cleaning agent. If the blanket has a slight depression, or the ink transfer performance is reduced, you can use the blanket restorer to scrub, then clean it with water or a damp cloth, and dry it. This can restore the elasticity and printing performance of the blanket. Second, the storage of blankets Keep the blanket, avoid contact with oils, acids, alkalis, salts and chemicals to destroy its elasticity. The blanket is also afraid of light, heat and humid air, which will cause sticky skin, dry cracks and hardening on the surface of the blanket Defects such as cloth rot. Therefore, it is best to put it in an airtight container or a well-ventilated place. The indoor temperature should be 20 ℃ and the relative humidity should be around 70%. If the rubber cloth has been cut, it is best to lay the rubber flat on the rubber surface, coat a layer of talc powder in the middle, and avoid adding sulfur powder, otherwise it will make the surface excessively hard and smooth. In order to ensure that the rubber cloth removed from the machine can be used in the future, it must be cleaned with detergent or gasoline, and washed with a 5% alkaline solution to saponify the surface of the rubber cloth. After drying, apply a layer of talc. When you continue to use the machine, you must scrub with gasoline and pumice powder to make the surface reappear. 3. Remedy of blanket In daily printing, sometimes the surface of the blanket becomes sticky. In addition, more or less will bring some broken paper scraps, impurities and sand particles into the roller, so that the rubber blanket is depressed or small holes appear on the surface. Then it must be remedied in time. The remedies are roughly the following: 1. Remedy for sticky blanket Tacky blankets are mainly caused by poor oil resistance. Rubber often absorbs a large amount of washing liquid to expand it. Severe stickiness will completely change the surface properties of the blanket, making it unusable. The slight stickiness will also make the printing paper adhere to the surface of the blanket, which not only affects the quality of the product, but also makes it difficult to continue printing. Therefore, the blanket should be cleaned in time. It is best to use a more volatile solvent to reduce swelling, and then apply talc or sulfur powder to the surface of the blanket, which also has a certain effect. 2. Low concave remedy for blanket At the time of printing, if the blanket is pressed into a partial depression, and the picture cannot be transferred completely, the low depression must be remedied in time: generally it is patched on the reverse side of the blanket. Use the pencil to draw the mark of the low concave part, and then remove the blanket, draw a mark of equal size on the opposite side of the blanket, and select a paper with a thickness that is appropriate for the low depression of the blanket and cut it to size For patching with the same shape as the mark, it is best to use the tearing method, so that the edge of the paper can be kept trapezoidal. The paste or glue should not be too thick during patching to avoid forming a hard block after drying. Make up too thick, otherwise it will increase the friction between the printing plate and the blanket, affecting the life of the printing plate. If the area of ​​the low concave of the blanket is large, it can be directly filled in the padding paper, but the position of the padding must be accurate. 3. Remedy for blanket holes For the holes on the surface of the blanket, you can use glue such as raw rubber, cowhide tendon, plaster, etc. Wash the blanket before sticking, and then pull the glue into a thin strip and dissolve it. In the eyes, after drying, use your fingers or steel sheet to gently flatten the surface to make it smooth and smooth, and then apply talc to print. Diy Paper Box,Diy Paper Mache Box,Diy Small Paper Box,Diy Kraft Paper Box Ningbo DSS Intelligent Technology Co., Ltd , https://www.dsscosmetics.com