Gravure plate failure analysis and troubleshooting: knife or ink
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In the printing process, there are often phenomena such as knife and ink, which is also a comprehensive factor.
In the ink, dust, paper dust, dust and other debris are accumulated under the scraper, and the high-speed printing is extremely easy to scratch the plate roller to produce ink and knife.
The scraper has a small knife edge, so that the ink is not cleaned and the knife is produced.
Since the printing plate is electrically engraved on the plated copper surface, and later used for the abrasion resistance and corrosion resistance of the enhanced plate printing, a layer of chromium is plated, and the hard layer of the chromium layer is generally 800 HV to 1000 HV. After chrome plating, we have to go through the polishing process. Our company has introduced a world-class MDC automatic polishing machine, which can automatically set more than 100 individual parameters, which can fully meet the different requirements of customers for polishing.
The polishing process of the plate making is described above. If the polishing process is poor at the time of plate making, or the surface of the chrome layer is rough, the wire may be caused. If the depth of the plate roll is too deep, the hardness of the corner of the pattern is very large, and it is easy to produce the blade by grinding the blade out of the blade.
The ink quality is unqualified, the particles are too thick, and the ink sticks are easily formed under the doctor blade during printing, thereby generating the knife wire and the ink string.