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Various factors affecting the printing resistance of PS plate

various factors affecting the printing resistance of PS plate in the process of plate making

features of positive PS version version has good stability and is not affected by changes in temperature and humidity. Generally, points can be exposed under any temperature and humidity conditions. Long storage life, easy to use

2. the printing process is simple. As long as the exposure time, developer concentration formula, developer temperature and other parameters of the PS version are well controlled, it is easy to transfer the pictures and texts on the film and sulfuric acid paper to the metal aluminum alloy PS version, which is conducive to data control

3.the printing resistance of PS version is relatively high, especially for the long version. After the PS version is coated with baking solution and baked at high temperature, the printing resistance is more than 150000

4. good reproducibility of dots, high resolution, bright, round, plump and rich levels of gradients in the sun printed version. The reason for the bright and clean point is that the blank part adopts the electrolytic method to make the PS plate sand hole fine and uniform. Elimination method: replace the spring version has good printing adaptability and less water consumption, reducing the expansion rate of paper and the emulsification of ink version replaces the original Gravure version. There are two fatal weaknesses in gravure plate: A. due to the "dark reaction" of dichromate colloid which is difficult to suppress, it can not be prefabricated and stored in advance, which is inconvenient to use. The photosensitive adhesive is affected by temperature and humidity environment, and the operation is complex. The chemicals such as cyclohexanone, dichromate, acid phosphoric acid and sulfuric acid in LAC are toxic to human body; b. Dichromate chemicals pollute the environment and are carcinogenic

ps plate production process: aluminum plate decontamination treatment → electrolysis and grinding of sand holes → anodic oxidation → hole sealing → synthesis of photosensitive resin → preparation of photosensitive adhesive → coating photosensitive adhesive by coater in addition to cost → drying → PS plate

the graphic part of the positive PS version is diazo compound, and the blank part is anodic oxide film. On the macro level, the PS version is flat, but on the micro level, it is uneven. Increase the moisture content of refrigeration materials by graphics and text) and ensure that the height width ratio of the upper mouth of the mixing and circulating system (otherwise the circulating system is not smooth) is higher for the good part and lower for the blank part

the formation of sand holes in the blank part of PS version

ps version requires that the image and text parts have good lipophilicity and the blank part has good hydrophilicity. The sand holes in PS version are used to store water in the blank part, so that the blank part of the printing plate is not dirty. The photosensitive adhesive layer of PS version is very thin. Therefore, the sand holes in the blank part are required to be fine and uniform. Generally, PS version manufacturers use electrolysis to form sand holes

ps plate anodizing purpose

in order to generate an oxide film on the surface of PS plate aluminum alloy plate base, so as to improve the mechanical strength, wear resistance, toughness and hydrophilic property of PS plate aluminum alloy plate base, the blank part of PS plate is an anodic oxide film

ps plate sealing purpose

block the micropores of the anodic oxide film to prevent the printing plate from being polluted and dirty

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