In the offset printing process, due to the sizing pore structure, smoothness, absorbency, viscoelasticity, etc. of the paper, the fillers, glues, and pigment particles are rough in the papermaking process. The appearance quality of the paper is dust, spots, fiber clusters, sand particles, etc The quality is poor, and stack failures often occur. There are many reasons for stacking, this article mainly talks about the failure of paper hair removal stacking. The fault of paper piles in the offset printing process is mainly caused by the depilation of the paper caused by the loose fiber structure on the surface of the paper. This phenomenon is mainly due to the poor printing quality of the paper. The fault is that the printed ink surface is chaotic. The whitening phenomenon, the paper flakes off the surface of the printing plate and the blanket are covered with paper wool. In serious cases, the printing plate and the rubber need to be scrubbed once every 1000 sheets, which will cause printing quality problems and delay production progress and delivery time. The hair removal of the front and back of the paper is a technical problem in the papermaking raw materials and the papermaking process. Offset printing is indirect printing using an intermediate elastomer rubber cylinder. The printing plate transfers the image to the rubber cylinder. The rubber cylinder is transferred to the printing paper under the action of the impression cylinder. During the offset printing process, the paper wool It will be transferred from the surface of the blanket to the printing plate. As the number of printing increases, the paper wool remaining on the surface of the printing plate will accumulate, which will cause the failure of the pile of paper wool. These paper wool will stick to the The printing plate is printed on the surface of the imprint, which affects the quality of the printed product. The fiber paper wool and paper dust on the paper have both water absorption and oil absorption. After the paper wool is adsorbed on the printing plate text, as the printing plate cylinder transfers, it first encounters the water roller wet, and the water roller is There is a certain pressure on the printing plate. After the paper wool is wetted and pressurized by the water roller, most of the paper is closely attached to the graphic of the printing plate, and then the ink roller injects the ink. At this time, the paper wool after wetting has oil resistance. Although the ink is not absorbed by the four inking rollers, it will appear white when transferred to the rubber stamp. Solution: (1) Master the balance of water and ink during offset printing, and reduce the moisture on the plate surface and reduce the pressure of the water roller on the plate surface under the premise of not dirtying the plate. The purpose is to make the paper wool on the surface of the printing plate reduce wetting as much as possible, so as to reduce the oil resistance of the paper wool and increase the inking force, and try not to make it close to the plate surface. (2) Increase the fluidity and viscosity of the ink, add a small amount of ink to adjust the ink, print the product with less ink, and increase the pressure of the inking roller on the surface of the printing plate, the purpose is to pass the paper wool on the printing plate When the inking roller is inking, the paper wool is pulled out and transferred to the inking roller, mainly accumulating on the inking roller. Trp Handle Chef Knife,Stainless Steel Knife,5Inch Utility Knife,Black Pp Handle YANGJIANG SHENGJIA TRADING CO., LTD. , https://www.yjkitchenknife.com
In addition, adjust the printing suitability of the ink, add the ink adjustment oil, and the auxiliary materials must be stirred repeatedly. The problem can also be solved by appropriately increasing the ink delivery volume of the ink fountain.