Analysis on the application of CTP technology in C

Analysis on the application of CTP technology in China at the present stage (Part 2)

the printing resistance of the printing plate still needs to be improved

although the printing resistance of CTP was originally advertised to be as high as 200000 or 300000, this is not the case. In Zhongshan Zhongrong paper printing products Co., Ltd., the printing machine using CTP printing plate often stops waiting for the plate, because CTP printing plate often appears the pattern phenomenon after tens of thousands of printing, and sometimes even only oneortwo thousand printing

the above points are important factors that restrict most printing enterprises from introducing CTP equipment on a large scale. In addition, although some printing enterprises have installed CTP equipment, they have not tapped their potential. Similarly, take Zhongshan Zhongrong paper printing products Co., Ltd. as an example. The company's main business is to print the outer packaging of goods for P & G and other companies. Most of them are long version printing, and the printing quantity is often hundreds of thousands of copies, so the requirements for the printing plate's printing resistance are relatively high. In 2001, the company introduced a Cleo trendsetter. However, most of the company's customers provide film. Even if the customers bring electronic documents, it is also a long version list, and the requirements for delivery time are not strict. However, one of the main advantages of CTP is that it saves the link of film output to buy time for production, and one of the main disadvantages of CTP is the relatively low printing resistance. In fact, the more short version live parts, the more the advantages of CTP can be reflected. In this way, the characteristics of the company's own production make the advantages of CTP unable to be reflected, and an expensive equipment can only be decorated

to sum up, the author believes that the large-scale use of CTP by general color printing plants still needs careful consideration

ctp's advantages in the newspaper industry

although the time for CTP to be used on a large scale in general color printing plants is not ripe, its successful use in the newspaper industry is obvious to all

timeliness is our life. Newspaper printing requires that the printing time be shortened as far as possible to extend the deadline of newspapers. At present, the plate making speed of CTP equipment is constantly improving. It is understood that Agfa Polaris XdV, the fastest CTP equipment in the world, can output 350 quarto plates or 170 folio plates per hour. Therefore, using CTP plate making can buy a lot of time. After Yangcheng Evening News adopted CTP, the deadline was delayed by more than an hour, that is, it could grab more than an hour, and won good economic and social benefits. After the people's printing factory used CTP, the printing time was 20 minutes earlier than before. The Beijing Evening News, which used to start printing at 3:00 p.m., can now be printed at 2:40

newspapers in Europe, America and Japan introduced CTP technology first, for no other reason, that is, the integrity of pre press materials of newspapers is easy to control. The newspaper office must complete a large number of pages in a relatively centralized time until the plate making is completed. All flexibility adjustments are limited to the time between the deadline and the machine printing. At present, a large number of newspapers continue to expand their editions, changing the Black Edition to the color edition, and changing the single-sided color to the double-sided color, which greatly increases the pressure on many newspapers that still use the traditional plate making process

Yangcheng Evening News is a successful example of the application of CTP technology in domestic newspapers. Yangcheng Evening News has more than 600 folio pages a day, and the workload of manual edition making is very large. The newly established printing center of Yangcheng Evening News is equipped with eight twin tower printing machines, which can print 1.2 million folio newspapers an hour. The eight machines need 512 folios to fill the pages in turn. Time is very urgent. At present, Yangcheng Evening News has a total of 6 Agfa CTP equipment, including 2 in the old factory and 4 in the new factory. A 10km optical cable has been laid between the old factory and the new factory. The transmission speed is very fast. Coupled with practical software design, CTP equipment can be controlled uniformly according to needs. In addition, the new factory adopts the CTP of quarto version, which is flexible when printing, and it has two scanning heads. The air tightness test method of doors and windows Jisa 1516:1998. Each machine can produce 200 quarto versions per hour, which is very fast. Except that the first version is a little slower, three quarto versions can be produced in the next minute. In the past, the deadline for Yangcheng Evening News was 11:00 a.m., but now it's 11:30 ~ 11:45 in time

at present, more and more color newspapers need higher overprint accuracy. The overprint accuracy of CTP equipment cannot be achieved manually. Manual operation may not achieve unified and stable quality control due to factors such as experience, lighting, line of sight position, etc. Under the traditional plate making process, it takes 40 minutes to make a set of color newspapers, and after using CTP technology, the first version only takes 4 minutes. In terms of manpower, the difference is also obvious. In Yangcheng Evening News, it takes at least 30 people to use the traditional plate making process, and now only 5 people. It seems that the input cost of plate materials is large and the machine price is high, but it is definitely cost-effective when considering the benefits brought by time and quality, saved labor costs, environmental protection and other aspects

conclusion

in view of the equipment cost, plate price, technical level and many other reasons for the gradual decline of the elongation, it will take time for CTP technology to be applied on a large scale in general color printing plants. However, we can see that CTP technology is booming, and more manufacturers have joined the research and production of CTP equipment and plates, which makes CTP technology continuously improved, and the prices of CTP equipment and plates continue to decline. At the same time, many domestic manufacturers have also begun to produce CTP equipment and plates, and CTP localization and plate localization are just around the corner. In addition, because it can seize valuable time, the application of CTP technology in the newspaper industry is very necessary, and the practical application experience of many newspapers has also proved this. It is believed that CTP will shine brightly in China's printing industry in the near future

information source: printing technology - packaging printing