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Water's role in the lithographic printing


Leading role in the balance. Fountain solution is too acidic or alkaline is not conducive to printing, different printing plates on the PH value of the fountain solution requires not the same. Concave version of PH is 4 ~ 5, PS version of PH 5-6, multi-metal version of PH is 6 or so. Water fountain has a direct impact on the size of the printing quality. Of water the size of the layout but also by the direct impact of the printing speed. When in the design of lithographic printing presses. Have been unified into account the water, the printing speed of the inking system and the balance 3. Identification of water film offset printing layout. Excessive moisture layout as follows: (1) ink fountain roller and the bead on. (2) shovel, scraping the ink droplets from time to time, transfer roller sliding phenomena (3) the accumulation of ink on the ink roller. (4) The soft printing paper changes, the lack of tension. (5) location of imprinted seams, made false, traces of water soaked. (6) shut down after the rough layout of a long time. (7) printing is interrupted,[link widoczny dla zalogowanych], the larger deviation around the ink ( Blanket tail water mark, a serious water droplets shed from time to time. Layout of water appears dirty version is too small, imprinting is not clear. To be diligent in checking the production process, determine the cause and quickly make adjustments to work to ensure print quality. One made in a 9 Shuayin Third, no rise of water level in printing lithographic printing both advantages and disadvantages, water, ink balance has been the unresolved technical problems. For decades, no standard has been printed printing workers seek. From the end of the beginning of the 60s, the world's developed water on the offset printing equipment, into the mid-80s, the Japanese developed a uV light, strong adhesion to silicone rubber plate, with a string of ink temperature control device cooling system, designed for The deployment of waterless offset inks, which are the absolute foundation for the development of offset printing. It is due to remove moisture, then water, excellent ink balance, the operation more simple and boot normally try to print 30-40 sheets of paper to get into the stable state, and because there is no water, the ink will not emulsify and therefore do not deformation network problems exist, it can be printed to 19o cable / cm, more than offset the water up to 80 network cable / era more than 1 times higher,[link widoczny dla zalogowanych], greatly improving the quality printing. Secondly, from an environmental point of view, the absence of fountain solution, chromic acid does not exist or alcohols pollution of the environment has greatly improved the working conditions of workers. (Huang Naichang) lead to tire print wheel printing the tide of technological progress, the introduction of new technology is to enable the product to achieve higher grades, print speed,[link widoczny dla zalogowanych], print quality and better purpose. Therefore, to achieve offset printing is the printing of each book's primary objective enterprises in technological innovation. Practice has proved that tire is the ideal tool for offset printing books. Change the tire round lead in China was a few years ago from the Yellow River basin provinces started to now has accumulated considerable experience. Therefore, lead rubber tire on a wheel change a cheap, simple and practical way,[link widoczny dla zalogowanych], a feasible and reliable way. The correctness of the overall design of rubber tire, determine the success of conversion. Aluminum wheels modification is a complex and very difficult work. All structures are of lead wheel designed for the letterpress, which is modified, the inevitably subject to many restrictions, and offset printing has its unique requirements, so the overall design must be precise, full use of the existing wall and structure to meet the offset printing process requirements. The main use of the following high-precision mechanical structure, can solve the problems of lead wheel machine, to prevent failure. 1. With high precision and high material and scientific treatment, and helical gear primary drive mechanism. New institutions to increase the number of teeth meshing,[link widoczny dla zalogowanych], improved stability and transmission gear wear, effectively preventing the \BB-type offset press of the heart. are dual high-precision design. 3. have a high material quality, high-precision roller bearing structure. effectively address the support of the lubrication, and wear two major issues to ensure high-precision high-speed roller normal long operation. 4. have a new water supply structures. 5. a unique clutch body. to ensure precise clutch cylinder and the impression of stability at high speed. Guangzhou to build a large base of industrial packaging paper introduced the world the most advanced equipment, technology and modern management in southern China's largest industrial packaging paper base - Guangzhou Weida Industrial Co., Ltd. recently announced the setting of high. the company to the people of the former paper mill based in Guangzhou, and Guangzhou Development Investment Corporation, Wang Hong Kong Investment Company Limited formed a joint venture constituents. Panyu million, the company built in the dumping of sand, covering 800 acres, the introduction of foreign advanced level 90's annual output of 10 million tons of coated paper board production line of high-level, with a total investment of 1.28 billion yuan, built two years. estimated annual output value of eight hundred million yuan, annual profits and taxes billion, the project included in the state August 10

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