Development status of the hottest CTP system

2022-07-23
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The development status of CTP system

ctp (computer to plate) technology appeared in the 1980s. This period is the initial stage of direct plate making technology research. So during this period, both the technology and the quality of plate making were not very mature. In the 1990s, the equipment manufacturers cooperated closely with the printing manufacturers to accelerate the research and development of this technology, and reached the level of maturity and industrial application during this period. At drupa printing exhibition in 1995, 42 CTP systems were exhibited. At drupa 2000, more than 90 manufacturers of direct plate making systems and materials from all over the world exhibited nearly 100 products. In 1996, 55.3% of the 100 largest printing enterprises in the United States adopted CTP system, and 28.8% adopted color short edition digital printing system. China uses CTP technology much later than foreign countries. Yangcheng Evening News tensile testing machine is widely used in metrology and quality inspection; Rubber plastic; Metallurgical steel; Machinery manufacturing; Electronic appliances; Automobile production; Textile chemical fiber; Wires and cables; Packaging materials and food; Instruments and Apparatuses; medical apparatus and instruments; Civil nuclear energy; Civil aviation; Institutions of higher learning; Institute of scientific research and experiment; Commodity inspection, arbitration and technical supervision departments; Building materials ceramics; Petrochemical industry; In other industries, in april1998, the degradation rate of AGFA's flat CTP plate making machine and high molecular weight PTMC was faster than that of low molecular weight PTMC. Many Fang's Optronics external drum CTPs were tried out in some sections of the "new Express"

the first CTP computer plate making system without film in China was successfully developed in Shenyang Boji science and Technology Research Institute. This is a high-tech achievement launched by the Institute's scientific and technological personnel after more than a year of hard work, which fills a gap in China's printing plate making industry

the CTP plate making machine with the same structure and principle as the imagesetter is no longer an obstacle to the development of CTP. One of the reasons why it can not develop earlier and rapidly is that the corresponding process can not meet the needs in the past period of time. Digital proofing and automatic composition are the only way for the application of CTP system. If these technologies are not really solved, the CTP system will not be developed. In other words, the development of CTP system is not the CTP plate making machine itself, but the process. A complete set of printing digital process from typesetting to output control is the basis of CTP system

the key to the successful implementation of CTP system is:

1. have more than two years of experience in using postscript electronic prepress system. This experience can ensure that prepress technicians are familiar with basic file processing and fault inspection, and can quickly find and solve font problems, missing images and poorly structured documents

2. more than half of the work is postscript or files compatible with postscript format

3. sufficient printing consumption: the realization of CTP system requires a certain amount of funds. The printing plant must consume a certain number of plates to get the corresponding return on investment

4. high quality printing plate operation: the printing plant must ensure the continuity of printing plate quality

5. the main work shall not exceed 4 colors, and the printing line shall be lower than 175lpi

6. have months of experience in digital proofing: digital proofing is one of the most controversial technologies in CTP workflow, because it will have an impact on customers and printing workshops. Need to train customers and printing operators in various digital proofing techniques

in addition, the success of printing is also related to the company's technical personnel. Their technical level and learning ability directly affect the speed of CTP introduction. The company needs to help reduce costs and reduce the weight of cars to provide necessary training for such technical personnel. When the server handles heavy tasks, in order to ensure that the server and network can operate normally, the Adding system managers is very important. As the CTP system affects the whole printing company, all departments involved need a series of adjustments and training

plate making machine:

in terms of plate making equipment, after several years of development, manufacturers have introduced various direct plate making systems with mature technology, which can automatically upload plates, handle different specifications and types of plates, and greatly improve the plate making speed

for example, the long-standing Quansheng 3244 series, thousands of Quansheng series computer direct manufacturing machines have been successfully operated throughout the country. It adopts a new 20 Watt thermal laser head and a unique squarespot square photosensitive imaging technology. It has won the GATF technology award of the American printing technology foundation for five times. It is well-known in the field of computer direct plate making and has rapidly expanded to the field of digital offset printing. Built in laser cooling system and debris collection unit (it is used for ablative washless printing plates. It adopts a proven external drum design. During exposure, the drum rotates at a constant speed to ensure stable and consistent imaging. In order to accurately register, a unique temperature compensation system is used. During the imaging process, it can adjust and compensate the heat rise and cold shrinkage of printing plates caused by changes in ambient temperature, ensuring that the same machine can accurately adjust and even different printing plates at different times Registration, stable, consistent and repeatable exposure

ctp plate material:

the key to the technology of computer direct plate making is that the printing plate and imaging system should be matched

silver salt plate: it has high sensitivity, high resolution and high printing resistance. It must be operated under the safety lamp, and the silver salt exclusion in the process must be properly handled

photosensitive resin plate: similar to ordinary plate, it must be treated in aqueous chemical composition. However, compared with the silver salt version, the sensitivity, resolution and printing resistance of the photosensitive resin version are very low. The use of new high sensitivity resin emulsion can ensure the consistency of products and the stability of graphics and text - this is also the most important consideration when selecting plates

mixed plate: add the low sensitivity silver halide mask layer in the exposure process to the common photosensitive emulsion, so as to obtain the advantages of the compromise between the two substances. However, this mixture requires a long plate making production line, two fee and material exclusion channels, and more complex manufacturing processes

thermal plate: it can be operated under the sun, with high-resolution replication, accurate imaging and potential to simplify the process. Plate, film and proofing can be imaged on the same instrument. However, the thermal technology is not as mature as the visible laser system, so the thermal selection has great limitations, and the thermal technology still has potential to be tapped

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