Digital printing is based on a relatively complete computer data processing technology. It combines laser modulation scanning imaging technology with high-tech photosensitive materials and new printing inks to enable the computer-controlled digital integration of the entire printing process. It is a modern printing system with a brand-new concept and process that is completely different from the concept and process of traditional printing.
Among them, laser modulation scanning imaging technology is mainly used in the mechanism version. During plate making, the color separation data signal (monochrome pixel digital signal) is input to the laser controller, so that the synchronous monochromatic laser beam is emitted, and then converted to screen data by RIP.
Carry out laser modulation scanning imaging on the printing plate roll, and the photosensitive material on the cylinder forms a pattern that can absorb ink or toner after being photosensitive, and the printing can be printed. The different plate-making principles with the photosensitive material of the printing plate can be roughly divided into two categories: one is the laser electrostatic imaging type. Such as Indigo company E-print1000 and Omnius digital printing machine. The other type is silicone rubber type waterless offset printing plate type. Such as Heidelberg's Quickmaster DI (Quickmaster) and KBA company and Sai Angel's 74Karat digital printing machine.
All digital printing equipment have roughly the same laser modulation scanning imaging system. The lasers of this system are usually argon ion laser and semiconductor laser, and the acousto-optic modulator acousto-optic crystal is lead molybdate (PbMoO4). The transistor is lithium niobate (LiNbO3). Here, the modulator is still an important and indispensable core device for transmitting graphic information.
Digital printing is an important symbol of modern printing. Realize personalized on-demand printing. That is, the realization of dynamic or variable image printing will have a major impact on the traditional printing process.
Another revolution to traditional printing, it involves a variety of high-tech such as computer information processing technology, laser technology, material science and so on. They are an organic whole. Therefore, laser technology should also be one of the indispensable high and new technologies to promote modern printing.
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