Inspection of the hottest CDI plate under showct s

The inspection of CDI plate under showct special software

after the inspection is correct, the final PS file can be printed to flexrip/C or sparkrip software to generate a special document for engraving. When printing PS documents, pay attention to select the PPD document corresponding to the CDI machine model. Although the limit switch is only applicable to the time when the speed is not very high, set the angle and line number of each color plate according to the flexographic printing process. According to the current configuration of domestic flexographic printing equipment, the most commonly used number of printing plate lines is 150, and the angle arrangement of four-color plate is: c:67.50, m:37.50, y:82.50, k:7.50. For special live parts, just slightly adjust the individual color plates

in order to avoid human keyboard input errors during layout, the above commonly used angles and line numbers of flexo printing can be preset in the PPD file. The PS files arranged are interpreted by flexrip/C or sparkrip to generate len files for CDI engraving system. Each len file is the color separation version of the set of live parts. The files in this format can be checked with showct or view special inspection software of Esko graphics company for the last time. Showct or view software has powerful functions and can check the size, resolution, buckle, number of lines, angle and other aspects of the live parts and their parts for laser engraving. The biggest feature of this software is that it is combined with the DGC software of esk0 graphics company, which makes it easy to quantify and control the point size under various line numbers and point percentages, and this quantification and control can be completed on the computer without repeatedly borrowing the high-cost exciting plate for measurement and control, which is difficult for ordinary RIP software

for example, for dpu45 laser plate, the square occupied by 1% circular points of 150 lines at 2540dpi resolution is 13 squares, which is equal to 1% points firmly on the plate after the plate is made in the future (its diameter is plastic instead of copper, and its utilization is relatively mature to 19um). Then, 11 ~ 12 small squares may be 0.9% points, and 10 or less small squares are less than 0.9% points. In actual plate making and printing, 0.9% - 0% of the dots below 1% either cannot be engraved or printed on the plate, which is easy to cause the printed matter to get dirty during printing. Therefore, we should try our best to avoid spots less than 1% on the printing plate, and even avoid spots less than 2% in the actual prepress processing. We can use the above showct to check whether there are points less than 2% or 1% on the document, and correct them in time before printing; Others such as document size, line number, angle and resolution can also be checked under the corresponding menu

next, len files can be prepared for engraving on the sko graphics special laser engraving platform, grapholos NT system. In order to save materials and energy, the documents of the same type of plate are usually combined and then engraved. This part of the work is completed by the two software of merge and expose in the system. When engraving, you should pay attention to the model of the plate and the engraving parameters. Different plate plough numbers have different parameters. Of course, for plate makers using single-sided exposure machines, the back exposure must be done before engraving the last plate, and the laser plate after engraving must be the main exposure immediately, because the current ranking of the laser plate has just come back, and the photosensitivity and sensitivity are relatively good, The laser plate after laser ablation, especially the field part, is afraid of the interference of dust, hair and fiber, which also means that the environmental control of the laser room is equally important

the laser version that has been subject to main exposure will go through a series of processes such as plate washing, drying and post-processing. When washing the version, you must use fresh liquid medicine for washing the version, and control the technical parameters related to washing the version at the same time. When drying, the temperature should be controlled at 60 ℃, and there should be good air circulation in the oven to facilitate the volatilization of solvent on the printing plate. The drying time of using environmental friendly potions should be controlled at about 3 hours, and that of non environmental friendly potions should be controlled at about 2 hours. After drying, the printing plate should be given a certain time to cool to room temperature before post-treatment. Improper processing time will lead to poor ink on the printing plate, cracking, low printing resistance. It is suggested that the operators should systematically detect the parameters of relevant technologies in the process flow at regular intervals to ensure the quality of the printing plate

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