Electronic color separation principle and process overview

As we all know, information and information are the basis of a country’s cultural, social and economic development. In today’s social activities with information as its intension, printed matter is still the main means of transmitting information and preserving information, and image electronic color separation and plate making is its core . Therefore, the electronic color separation machine widely absorbs and applies high technology, and uses modern light and electromechanical integration to arm itself. At the same time, it has also led to the development of plate-making equipment. There have appeared electronic prepress processing technology and a series of products called electronic platemaking equipment. , such as full digital electronic color separation machine, electronic engraving machine, electronic whole page imposition system, CDTP system, image scanner, image printing equipment, laser direct plate making system and photoelectric detection equipment.

Development of an Image Prepress Processing Technology

The development of electronic prepress processing technology has experienced three waves with the electronic color separation machine as the representative: the first is the emergence of the continuous electronic color separation machine, the automatic drafting system of the original draft, and the popularity of the electronic color separation machine with dot generators. The feature is the electronicization of individual units of prepress processing operations. The second is the popularization of the receiving cases from the electronic color separation machine and the computational image processing system, which is characterized by the electronic printing unit as the unit in the prepress processing operation. The third is the integration of image and text processing and communication technology, which is characterized by the electronics of the printing industry (publishing industry).

From the development of electronic prepress processing equipment, there are mainly the following development directions. One is modularity. The so-called modular mainly refers to the analysis of the electronic color separation scanning, image processing and daylight recording unit is relatively independent, and constitute an open system of the standardization, in the expansion into an electronic prepress processing system, easy to configure. The second is electronic screening. Through the improvement of screening technology, the types of outlets, outlets, and cable lines are more abundant, which makes electronic outlets and party-regulation outlets more similar and perfect, thus ensuring the quality of output images. The third is all-digital. The digitization of the electronic color separation machine will realize the CCD platform scanning method as the mainstream, so that the color processing is not limited to the color coordinate system of yellow Y, magenta M, blue C, and black BK, which are commonly used in the printing industry, but a variety of color systems One to suit the needs of multiple uses. The fourth is to increase the number of peripheral devices. Peripheral equipment can be increased according to user requirements and quality and efficiency standards to reduce costs and improve quality. The peripheral equipment is mainly pre-adjustment and pre-proofing equipment. The fifth is to increase the function of imposition and the combination of images and texts. That is to say, an electronic image separation machine and a laser photo-discharging system are used to realize the graphic imposition combination in a computer, and then a photo-dividing film for printing is produced.

From the perspective of the development of the publishing industry, there are mainly the following three trends. (1) Color imposition system and its network, that is, the establishment of an information network for color image processing in the world and the formation of several image processing centers with various imposition systems. Users only need to configure relatively simple and inexpensive equipment. Can share the equipment in the network and obtain the necessary plate-making graphics and color separation films. (2) Laser direct plate making, that is, using laser to directly record the output graphic on the plate used for printing, eliminating the need for output film and flushing and improving the quality of graphic reproduction. (3) Multimedia publishing usually refers to Combining graphics, images, text layout, animation, sound, and music, and using the computer's interactive capabilities to read and exchange information related to each other, which is characterized by visual and visual images and sound, with a large amount of information. Business travel, real estate development, military command, securities and stock market trading, information consultation are of great significance, and the electronic prepress processing system can be used to output the required information at any time.

The current status and gaps of domestic electronic color separation technology

In the early 1970s, when manufacturers of electronic color separation machines represented by the United Kingdom, Germany, and Japan made major breakthroughs in technology, China had just begun to introduce and develop electronic color separation machines. With the cooperation of the Institute of Arts and Crafts, the Institute of Printing Technology of China and the relevant national units, the first DFS-1 electronic color separation machine was successfully developed to fill the domestic gap. Afterwards, the Chinese Institute of Printing Technology based on this, learned from foreign advanced technology, and successfully developed PDF771, PDF802, PDF823A, PDF823J electronic color separation machine, and was put into mass production by China North Industries Corporation Northwest Optical Instrument Factory, and also with Hell Company. Cooperation in China Beijing Scientific Instrument Factory assembled C-399ER, CP345 and other electronic color separation machine. However, due to our late start and various reasons, the gap between us and the advanced level in the world is still very great. The level difference between the whole machine is more than two generations, and the machine structure, software, materials, and processes are farther apart. This phenomenon is caused by the following: The main reason. 1) Insufficient understanding of the enormous role of electronic color separation technology and other advanced technologies in the printing industry, 2) not systematically absorbing and digesting foreign advanced technologies and equipment, 3) low level of computer application in the printing industry, 4) lack of new Research on theory and new technologies, 5) lack of advanced technology and managerial talents, 6) shackles of self-contained and sequel planning economic systems. As a result, an electronic color separation system that can truly produce production capacity has not been established.