CTP direct plate-making technology is the abbreviation of Computer to Plate in English. It originated in the 1980s and has more than 20 years of history, but its real application in the printing field is only more than 10 years. In 1998, the China Institute of Printing Science and Technology held the first China International Electronic Publishing and Multimedia Exhibition, introducing the main situation of CTP equipment to China for the first time. In May 1998, the Yangcheng Evening News Office introduced a direct plate-making system, becoming the first newspaper company in China to adopt direct plate-making technology.
The application and development of CTP technology is very rapid, the main reasons are two points, one is to break through the limitations of the traditional plate-making process to output the film through laser phototypesetting and manual imposition and plate-making, avoiding the printing plate in the plate-making process Flower marks, dot variations, dot inconsistencies caused by differences in exposure time, and errors and errors caused by manual spelling and printing. Secondly, the newspapers are continuously expanded, changing the black-and-white version to the color version, and changing the single-sided color to the double-sided color, which requires higher overprint accuracy. At the same time, in order to enhance the timeliness of the news, it is required to shorten the printing time as much as possible to extend the newspaper news deadline. Therefore, a large number of layouts must be edited in a concentrated time until the plate making is completed, which makes CTP direct plate-making technology that can improve the printing quality of newspapers and save labor, time, and consumables rapidly popularized in various newspapers.
The CTP system has been popularized among users at such an alarming speed. In addition to the good plate-making performance and the advantage of canceling film, the expansion of its application range is also one of the main reasons. At present, the direct plate-making machine on the market can be adapted to the needs of large-format and small-format printing sizes, single-dual color printing and four-color printing, newspaper printing and commercial printing. Therefore, it is very flexible to use.
For newspaper printing, CTP plate-making technology can also effectively reduce environmental pollution. Due to streamlining and optimization of the process flow, it is easy to set up a continuous production line with a high degree of automation. At present, the domestic newspaper industry is facing fierce competition. The CTP system can save the entire publishing process by 30-50 minutes. When the printing time is unchanged, the news deadline can be extended. This has a positive significance for increasing the amount of news information on the day and improving the competitiveness of the newspaper.
The adoption of the CTP system requires certain conditions. From the perspective of the enterprise, first of all, whether the enterprise has a large amount of plate-making work, the current better CTP plate-making equipment, the publication speed is very fast; second, the number of films and plates used by the enterprise should be If there are more, then the relative savings in film and time will be greater. If there are more short versions, the CTP system will have an advantage; third, the CTP system needs the support of other hardware, and there should be a certain number of single-sheet multicolor offset printing Machine or offset offset printing machine and so on.
The birth of a new technology often requires the continuation and development of the old process at the beginning, and finally produces mutations to completely replace the original technology, and CTP plates are no exception. The problem of plate material is the bottleneck of the application of CTP technology. Compared with the traditional PS plate, the price of CTP plate material is more expensive, so the printing cost increases. If the cost of plate materials can be reduced as soon as possible, the number of applications of CTP equipment in domestic newspaper printing will be greatly increased.
Computer direct plate making not only shortens the plate making process, it also improves printing quality, improves operating efficiency, provides wider and popular services, increases work diversity, etc., making printing more efficient. The good practical application effect of many newspapers proves that CTP direct plate-making technology will continue to shine in China's newspaper printing.
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