Wuhan Handern Lithography Process

DATE：2020/4/27 8:21:02 / READ： / SOURCE：This station

Wuhan Handern Lithography Process

       The printing plates used for Handern lithographic printing in Wuhan use lithography, glass plates, offset plates, and the scribe and non-scribe areas are almost on the same plane. The oil is resistant to water, and the non-marked part of the surface is hydrophilic and resistant to oil, thereby obtaining printing. The first is to transfer the ink to the graphic line of the metal plate, and then reprint it to the blanket and transfer it to the substrate. Lithography is the most primitive and bulky plate material, which has now been replaced by metal plates, which are made of zinc or aluminum. The glass version is also known as the Colo version, which is mainly used for printing fine paintings, ancient paintings, handwritings and other lithographic printing presses. There are two types of direct printing and indirect printing according to the printing method. Machine has been rarely used. Modern lithographic printing machines are all indirect printing machines. The printed matter is not in direct contact with the printing plate, but the pattern and text on the metal printing plate are transferred to the rubber roller through a rubber roller, and then printed on the printing member by the rubber, so lithography is also called offset printing. Lithographic printing presses have the advantages of high precision, fast printing speed, high production efficiency, good quality of prints, etc., and the development speed is relatively fast. www.handern.com Breathable membrane equipment
     There are many types of lithographic printing machines, such as sheet-fed printing machine, web-fed rotary offset printing machine; monochrome, two-color, four-color and other offset printing machines; full-page printing machine, folio printing machine, four printing machine Offset printing machines, such as printing presses, are mainly used for printing on paper. Now they are also used in flexible plastic packaging printing. It has the speed of plate making faster than gravure plate, and the price is cheap. It is suitable for small batch of quick offset printing press. It consists of paper feeding system, water and ink system, embossing system, paper receiving system and transmission mechanism. The main domestic production speed www.handern.com breathable film equipment is mostly sheet-fed offset printing presses, with a speed of 5000-10000 sheets / h. It can be used for web-fed offset printing presses with plastic source film printing plays. ～ 3000pm / h, there are single color, double-sided two-color, double-sided three-color, etc. www.handern.com Breathable membrane equipment ginseng. Plate materials for offset printing include protein plate, flat four plate, multi-layer metal plate, pre-sensitized plate and zinc oxide paper base plate. The copying process is as follows www.handern.com breathable membrane equipment
     (1) Photographic, color separation and screening. The original (black and white or color manuscript) is used to make yellow, cyan, and red after using the plate-making camera and color filters. You can also use electronic color separation to separate originals into color negatives. The negative picture made by photographic separation or electronic separation is taken by adding a screen to a negative version of the screen with a network line that can be used for uniforms. The color-separated photographic negative with dots is copied onto a metal plate for For printing, no matter what kind of printing plate, printing plate. www.handern.com Breathable membrane equipment
     (2) Exposure
       The process operations of printing can be divided into steps such as surface treatment, which light, and chemical treatment of the plate. www.handern.com Breathable membrane equipment

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