Cross-century technology (below)

1. The common feature of non-print digital printing without digital printing is the realization of variable information printing. The current non-lithographic printing machine can be made into three kinds of electrophotographic methods, electrocoagulation methods, and inkjet methods from a large aspect.
1. In electrophotography, the photoconductor (OPC) is first fully charged, and then an image is exposed with a laser or the like to generate an electrostatic latent image, and then the toner is covered with an electrostatic latent image, and the toner image is finally transferred onto the paper. There are two kinds of toner, powder and liquid. At present, powder toner is mostly used.
Crimpress is the first choice for digital printers using powdered toner. (The Agfa product range is available in both 32cm and 50cm format widths. The maximum length available for export is 11m. The mechanical part of this type of press is mainly composed of Xeikon. Companies such as the Xeikon DCP series and others such as Xerox's Docucolor 70 & 100' IBM Info70 & 100' Nilpeter Dl-3300 are also in the same category.The presses use electrophotographic four-color duplex printing with a resolution of 600 dpi. At the paper feed point, the stability and transfer rate of printing can be improved by adjusting the temperature and humidity.
The E-Print (Indigo) series uses liquid toner. In addition to the previous model E-Print1000, there are E-Print Pro, TurboStream, UltraStream, Omnius, Omnius CardPress, and others. Although the models are different, the basic structure and principle are the same. The resolution is 800×800 dpi and 800×1200 dpi. The structure of the E-Print1000.
2. Electrocoagulation The digital printing machine using electrocoagulation is represented by ELCORSY TECHNOLOGY of Monterey, Canada. This press is aimed at putting it into use after 2000. The detailed structure of the machine has not yet been announced.
This type of printing press is described above as a printing color group. If a plurality of groups are connected according to the necessary color number, a multicolor printing press is constructed. If an inverting device is added in the middle, both sides can be printed, so it can be used for printing for various purposes. Moreover, the image quality of the printed matter is close to a continuous image, so people are waiting for the product to be listed.
3. The ink-jet ink-jet printer is composed of a number of nozzles in a dot matrix structure. By receiving the computer's layout information, the ink is ejected from a very fine nozzle and the electric field is used to control the direction of the ink jet to generate images and graphics on the paper. There are also ink jet printers whose ink ejection and ink particle formation are achieved by charging and pressurizing.
The inkjet printer has a wide range of uses. It has general-purpose models and special-purpose models. However, depending on the purpose of use, the speed, resolution, and color reproduction area are very different. It is worth noting recently that the prices of large-format, high-quality inkjet printers have fallen sharply.
Second, there is a version of the digital printing press with a digital printing press. A preprinted printing plate must be mounted on the plate cylinder. It is only that such a printing plate is directly produced on the printing press. Compared with traditional printing presses, although this type of printing press also needs a printing plate, since it is a direct plate making machine, only one printing machine can complete the production process from data to printed matter, which saves equipment. , time, materials, and reduced production costs.
1. The main representative model of special-purpose printing press dedicated printing press is TruePress. The basic structure of the printing press is on the four-color printing machine with double-diameter cylinder structure. It is equipped with Mitsubishi's Silver DigiPlate to directly develop the main developing device, and the grade becomes composite. Structured printing presses.
Since the Mitsubishi Silver DigiPlate plate is used, the cost is low, and various properties of the printing ink can be selected according to different needs. Therefore, the printing machine is closer to the printing conditions of the traditional printing. Moreover, this plate can use UV ink to solve a series of problems caused by the long drying time of the ink in the past printing.
In the special-purpose digital printing press, there is also a model that attracts attention. This is the Sarah/KAB's 74 Karat. The design of the double-diameter cylinder is the same as that of Screen's TruePress.
2. The main representative model of the traditional type printing press is Speedmaster D174 from Heidelberg.
This model is based on the traditional printing machine SpeedMaser 74, therefore, can use PS plate or plate making method with a resolution of 2400dpi, the plate is used by PressTek's PEARLgold, and the same type of plate.
Third, the future of the subject of the above-mentioned digital printing presses are in the form of digital to receive the same information for printing, so the network or database data correctly transmitted to the press, this is a key issue. In the entire process of data transmission, the bottleneck must be clearly identified in order to increase production efficiency. It is necessary to conduct research in the following areas in the future:
1. Digitization of the whole page of prints;
2. Digitalization of analog negatives;
3. Electronic matching, electronic binding;
4. High-speed computing time;
5. Data processing adapted to the data volume;
6. Layout data preservation;
The use of the database.