Ctp thermal plate has high strength, moderate wear resistance, good forming, good hydrophilicity, high stability, good surface treatment and other advantages. The geometric performance indicators of CTP aluminum base plate mainly include the width, thickness, surface roughness and edge burr of the plate base. The thickness of the aluminum plate base for CTP plates is commonly 0.15mm, 0.30mm, 0.40mm, and the thicknesses most commonly used in Japan are 0.20mm and 0.24mm. The CTP version made on the basis of the international standard thickness in the range of 0.270 ± 0.010mm can be called 0.3mm thickness version in China.
At present, there are two main types of CTP plate-making machine in the market, the outer drum type and the inner drum type laser scanning plate making. The thermal CTP plate uses the outer drum laser scanning method for plate making, while the purple laser CTP plate making machine mostly uses the inner drum laser scanning method for plate making. While considering the cost, CTP version manufacturers should also combine practical application to maintain consistency in quality control of thickness, because some CTP plate setters, such as Heidelberg's CTP platesetter and screen machine, have no focus compensation and thickness fluctuations. The range is too large, which can cause focus problems. Kodak Perfect Platesetter equipment has its own focus compensation, which can overcome the influence of ctp thermal plate small thickness deviation to a certain extent.
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