DSS sleeve technology injects new life into flexible printing
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In packaging or decorative prints, it is often encountered that some designs are repeated in a full version and can be cut at will, while the two ends are not docked to meet the requirements of the seam, which is on a monochrome printing machine, whether offset or soft. Printing is hard to do. Although it can be done on a reel type printing press, if a monolithic printing plate is used to print on a plate cylinder, it is also very difficult to make a print without seeing the seam. In monochrome, color is more difficult.
It can only be solved by making a plate with a seamless sleeve plate.
However, if the answer is to use an analog method, that is, to apply a film to a seamless sleeve plate, it is not a trivial matter to avoid seams on the plate. Only with digital technology, the data can be directly from the computer to the plate sleeve, then it is easy to be seamless.
Flexographic printing is a common printing process for packaging and decorative printing, and often meets such printing requirements. In the early years, flexographic printers often felt embarrassed when they encountered such prints. However, since the CTP technology seamless seam-type flexible printing plate, such problems have been solved.
The basic plate making method of DSS (Digital Seamless Sleeves) digital seamless sleeve printing plate is as follows:
first step
Apply a layer of hot-melt adhesive to the space nickel or other metal roll. After drying, the calibrated photopolymer plate is wrapped on the metal roll and the two ends are assembled from the metal roll. Vacuum is applied to the core (there are many small pores on the surface of the roller), so that the photosensitive plate is adhered to the surface of the metal roller. Then, it was placed in an oven to be warmed, and the plate was fused with the adhesive layer on the surface of the metal roll, and then taken out and cooled.
Second step
The sleeve plate cooled by the first step is placed on the peripheral grinding machine, and the outer periphery of the sleeve plate is ground to a certain diameter (detected by a laser) according to the size requirements of the printing, and the layout is naturally smooth and flawless. After rubbing it, apply a black coating to the surface of the sleeve. Dry and spare.
third step
The second step of the prepared sleeve plate is subjected to digital laser scanning (CTP), so that the black coating on the sleeve plate is subjected to laser thermal erosion, and then UV exposure is performed as usual (the same as the usual flexographic UV exposure) .
fourth step
The exposed sleeve plate is placed in a corrosion chamber for rinsing corrosion, and then taken out and blown dry. After the proofing test, it can be delivered for use.
How is DSS investing in the flexo market? OEC was the first company to officially adopt DSS technology in 1997, and its development experiment began in the early 1990s. More than a dozen sets of such plate-making systems have been put into use in the US flexo market, providing plate-making services for hundreds of flexo printing plants, both in narrow and wide format. The flexible packaging of the famous Kraft Food Company in the United States has changed the packaging printing on one production line to DSS digital seamless seam printing. It is also planned to change the printing of its product packaging to DSS technology in 2001 (regardless of offset printing). Or flexo, or other printing methods). And according to professional estimates, DSS technology will be further welcomed and promoted.