Five kinds of CTP system introduction

CTPI photographic direct platemaking direct platemaking technology It originated in the 60s, was first filed by Kodak Company, and applied for a patent, and later there was 3M Corporation (1969) Mitsubishi Paper Corporation (1973) AGFA Corporation (1973).
In the 1980s, the Institute of Printing Science and Technology of China and the Institute of Photographic Science of the Chinese Academy of Sciences had already used photographic direct plate making materials, but its application was not extensive enough. Its technical feature was to get rid of the negative plate printing plate. In the early 1990s, computer-assisted direct plate-making technology was adopted to form a CTP computer-to-plate system. Its resolution was usually in the range of (1200-5000) dpi. All plate-making equipment was scanned by computer-controlled laser to image and then developed and fixed. Into the printing plate.
The image quality of 1%-99% dots with an accuracy of 200 lines or more is significantly better than that of traditional printing plates. This advanced equipment, China has introduced several sets. Currently in the learning stage, because the product supporting materials are being developed, it cannot guarantee the supply.
CTPII Computer Direct Plate Making Technology This technology was first introduced at the International Printing Exhibition in Heidelberg in the early 1990s. Since its launch, it has installed more than 1,000 units, of which China has introduced more than 10 units and mainly printed 200-5,000 copies of short-lived versions. This technology is a digital printing process integrating plate making and printing. It must use special equipment and waterless offset printing plates. All raw materials need to be imported.
CTPIII computer direct printing In 1993, for the first time, Agfa, IBM, Xerox and other companies successively produced their own digital presses. The current installed capacity has reached more than 2,000 units, including 20 units in China, with a resolution of 600-800 dpi. Because of its low resolution and low print speed, the development situation in China is not very good. Its printing principle is to use a special light conductor film pre-installed on the printing cylinder, the computer-controlled laser beam output to the surface of the printing cylinder, The formation of a latent image, printing with toner or electronic ink, is still in its infancy.
CTPIV Digital Proofing At present, developed countries have increasingly adopted digital proofing technology. In the past two years, digital proofing CTPIV has been ranked second in the United States in international major printing technology statistics. China's CTPIV is still in the observation stage and is rarely in production. use.
The digital proofing system is developed on the basis of the color printing technology. Various printing methods can form a digital proofing system as long as they have the color management, pre-calibration function, sufficient resolution and output format required for printing. The physical parameters of paper used for digital proofing abroad have also gradually approached ordinary paper, and some have been able to use newsprint.
Because the digital proofing system has the advantages of simple proofing process, high speed, and consistent output results, it can meet the requirements of proofreading. The digital proofing system will soon be practically applied in the printing industry in China, especially in the newspaper printing industry. Hebei Daily has already made a lot of advantages in its practical application. Proofing with newsprint is just a step away. The difference in work is the perfection of the color-removal management, pre-calibration, and other processes, and data summarization.
CTPV computer inkjet printing, also known as pressure printing, the process is a computer-controlled inkjet head will be very small ink droplets directly onto the paper, forming a graphic. The actual printing in the printing industry was more successful than the Israeli Sageterx 6240 digital press in the late 1990s. CTPV is completely different from the current conventional printing process. The fundamental difference with CTPIII is that CTPIII is printed with a printing plate; CTPV is a non-printing printing.
In this area, there are many new technologies and cutting-edge technologies that have attracted our attention. At the beginning of 1999, Sitong boldly proposed that platemaking and traditional offset printing should be combined to exert their respective advantages and form a new printing process. This process breaks the traditional prepress-printing-after-printing laws. A computerized version was formed and the inkjet proofs were printed first. Satisfied, the inkjet-printed bottom plate realized CTPIV non-printed inkjet printing or the printing plate CTPI used a large number of traditional offset printing processes.
The first printing and then plate printing and then printing this cycle process route, this cycle of process flow is a new way of spiral marking era eradication printing mode. It made the traditional offset printing technology ascend to CTPV, the contemporary top technology, and theoretically solved the difficulty of making new CTP technology difficult to popularize in China due to cost and other issues. Hebei Daily boldly practiced, with the support of Huaguang and Founder, solved problems such as computer interface, obtained gratifying results in November 1999, successfully printed the standard newspapers, and developed suitable national conditions to save money and produce Effective and practical CTP system.