Key points of developing operation technology of t

2022-08-12
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Key points of PS version development operation technology

operators who are new to PS version development (taking manual development as an example) have a common problem, that is, they think that the development of PS version is just to put the sun dried PS version into the development pool and shake it for a few times, and then wash it with water, add development ink, remove dirt, and apply peach glue. There is no technology to talk about. In fact, the development of PS version has technical requirements. It is a chemical reaction process, which uses the characteristics that the photosensitive layer without light is insoluble in dilute lye, while the photosensitive layer with light is soluble in dilute lye. This is what every operator should know. To master the development technology of PS version, you should pay attention to the following points

1 ﹐ understand the self performance of PS version

at present, because the technology of PS version produced by various manufacturers is slightly different, the products also have their own characteristics. The market of tensile testing machines and other testing instruments for PS plates with more than 4 grams (thicker) of oxide layer per square meter and high-temperature plate base sealing treatment is also greatly optimistic about the good alkali resistance performance; The PS version with less than 4G (thinner) oxide layer per square meter, without high-temperature pore sealing treatment or without oxidation and only hydrophilic layer, its strong alkaline resistance is weak. In addition, the performance of the original material has also improved. The same PS version of Pentium has different performance due to different production dates. Operators must understand the performance of the PS version used, so that they can correctly choose whether the main developing agent is strong base or weak base, so as to speed up the development speed of the PS version, increase the hydrophilicity of the version and the printing resistance of the printing plate, and prolong the service life of the printing plate. In addition, we should also consider its negative effects on the oxidation layer and photosensitive layer of the printing plate surface, such as erosion, dissolution and destruction of the hydrophilicity of the plate base surface

2 ﹐ understand the concentration of the prepared developer

to make the PS version develop correctly, you must understand the concentration of the developer. Because the alkali resistance of PS version produced by each manufacturer is different, the concentration of developer should also be different (the ratio of hand display is usually: one liter of developer to three liters of water). Although the higher the concentration is, the faster the development speed is, the higher the concentration is, the photosensitive layer without light will be dissolved. If it is light, its inkability will be reduced, and the dot will be reduced. If it is serious, it is easy to cause the stencil or the plate to drop. There will be broken lines at the places with long and thin lines, the handwriting on the layout will change color (purple red), and the printing resistance on the machine is very low. When the concentration is low, the development speed is slow, the development time is increased, and even the development is incomplete. As soon as the machine is on, it will be dirty or there will be obvious shading on the page, and the words and shading cannot be distinguished

3 ﹐ control the temperature of the developer

within a certain range, the temperature of the developer is directly proportional to the development speed. Firstly, the temperature is guaranteed by the after-sales service in the later stage. High development speed, low temperature and slow development speed. The most moderate temperature plastic composites lead the revolution in the bridge construction industry is room temperature, which is the best temperature for the development of PS version, because under this temperature condition, the operator can observe the development of PS version with the naked eye, and there will be no big deviation. If the temperature is lower than 5 ℃, the development speed will become quite slow and almost stop. At this time, an appropriate amount of developer prepared with hot water should be added to raise the temperature. When the temperature is higher than 35 ℃, the dissolution rate of the developer to the photosensitive layer and the oxide layer of the aluminum plate is accelerated. At this time, cooling measures need to be taken. In addition, the sudden cold and hot weather will also have an impact on the development of PS plates, especially during the season change, PS plates are often scrapped or the printing quality is degraded due to the unstable development temperature. At this time, operators need to rely on experience to

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