The printing industry is an industry that has an important impact on China's national economy. Newspaper printing is the most common industry for printing technology. The most important feature of newspaper printing platemaking is the extremely high requirement for plate making speed, and the large and stable plate-making volume must be met. The need for plate making in the industry printing requires stable and high-speed printing plate making equipment. At present, high-speed printing platemaking equipment promoted in China all come from foreign advanced computer-to-plate CTP equipment. The foreign high-speed CTP equipment currently monopolizes the entire printing industry's high-speed plate making market. This article will introduce you to Hanguang Apro Zinc Oxide Plate Making Machine. .
In general, the reflectivity provided by the plate supplier can only be used as a reference. We need to use Focus Cal reflect to perform automatic measurement on the left, middle and right positions of the plate. The average value obtained is the reflectivity of the plate. There is no standard for this value, and the reflectivity of different media is not the same. Therefore, it is very important to adjust the reflectivity of the plate when it is replaced with a new plate.
The surface reflectivity is used for machine detection. Different media usually have different surface reflectivity. If the reflectance is not set correctly, the machine may not report the edge and report the error, and thus normal plate making cannot be performed.
CTP technology is the continuation and development of laser photodischarge process and PS plate process. The biggest difference between the sensitization and the PS version of the sensitization mechanism is that the PS plate is exposed to a UV light source. In the printing, in addition to direct irradiation, there are scattered, refracted light exists, the loss of light energy is relatively large, and the laser plate system laser light source is mostly monochromatic light, generally choose a wavelength or a range of wavelengths, this is the laser The advanced location of the platesetter.
Exemption-free plate means that after the plate is exposed and imaged on the plate-making equipment, it can be printed on the machine without any subsequent processing steps. From the aspect of the plate making method, the processing-free plate is divided into two types: the plate for processing-free for a DI (Direct Imaging on Board) printer and the plate for exposure imaging on a CTP plate-setter. Exemption from processing CTP plates improves production efficiency without the need for chemical development, reduces the amount of energy consumed during exposure, reduces overall plate making costs, shortens the cycle of plate making processes, and increasingly emphasizes environmental protection today, its advantages— No pollution to the environment is more obvious.
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