Ink preset refers to booting Prior to printing , the prepressed electronic document data is used to accurately pre-set the output of the press. Because of its ability to significantly reduce boot preparation time, reduce paper waste, and increase production efficiency, the new sheetfed multicolor General offset printing machine equipped with this feature. But in the newspaper In the printing industry , due to the overall reduction in newspaper printing in recent years, The newspaper printing company's equipment update speed is slow. Except for a few high-end imported newspaper industry rotary printing machines, the general newspaper rotary printing presses are not equipped with ink preset functions, and even most city-level newspaper printing companies have not touched. Ink preset technology. Here, the author combines practical experience to explore such a newspaper printing press that does not have the ink preset function, and realizes the ink preset method.
Manual adjustment of the amount of ink
Before the official printing, it is necessary to adjust the amount of ink discharged by the newspaper printing press ink fountain. The common method is to adjust the ink key one by one according to the layout of each printing plate after the printer gets the printing plate. However, due to the high requirements for timeliness of newspaper printing, newspaper printing companies always hope to start printing as soon as possible after getting the printing plate, and according to the area of ​​the printing plate, the first time to adjust the ink volume and reloading the plate will delay the printing time. In addition, in the case of society where printing environmental protection requirements are more stringent, no flushing CTP plates have been promoted and applied, but the layout of the flush-free CTP plates is extremely small. It is difficult to use the human eye to evaluate the distribution of the layout of the layout. It is difficult to manually adjust the amount of ink.
In addition, there is no separation line of each ink zone on the printing plate, and the graphic is reproduced by the dot. Therefore, it is very demanding to evaluate the ink amount of each ink zone according to the printing plate and the manual, and the manual evaluation is required. The accuracy is not high. Especially in recent years, the printing output and benefits of the newspaper industry are declining. The printing position of newspapers is less attractive to workers, and workers frequently change jobs. If the newly recruited workers lack sufficient experience, the accuracy of ink pre-conditioning will be lower, so that the start-up stage will be lower. The time and material waste is large, and the print quality at the beginning of official printing is not high.
In addition, the newspaper printing press generally adopts a tower-shaped structure of vertical paper feeding, and the four-color ink fountains are distributed on the upper and lower platforms. If the pre-adjustment of the ink fountain is not accurate enough, after the start-up, the printer needs to correct the ink key while printing, and also needs to repeatedly sample, check the proof, climb the printing press to adjust the ink fountain, etc., and the labor intensity is large.
Method for implementing ink preset in newspaper printing
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