Thermal CTP leads the way Traditional CTF encounters revolution
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With the acceleration of the global digital printing process, China's traditional printing will encounter an unprecedented revolution. Since the development of CTP technology, thermal and violet lasers have always been the focus of debate in the industry. At present, many printing companies are waiting to see.
Thermal CTP first entered the Chinese printing industry. With the introduction of the violet laser CTP product, the absolute monopoly of the thermal CTP market is slowly being broken. Although the violet laser is the ideal wavelength for future visible light imaging, due to imaging and rinsing problems Still inciting the dominant position of thermal CTP.
First, the characteristics of thermal technology
Thermal technology is superior to violet laser technology CTP because the violet laser plate uses a photosensitive coating, while the thermal coating provides a dual imaging method that is exposed only when the plate coating exposure threshold is reached. If the laser energy is insufficient, the plate is not imaged; when the energy reaches the threshold, it causes a phase change, which in turn causes the coating to decompose, indicating that the plate is less likely to be underexposed or overexposed. In the past hundred years, dual imaging has been the goal pursued by most prepress research and development departments, and the high energy of thermal imaging principles has made this goal a reality. Therefore, the imaging of the thermal CTP system is more stable.
Another feature of thermal technology superior to violet laser CTP is that it adopts an external drum structure similar to the principle of the printing plate, which avoids deformation of the plate produced under two opposite anisotropy tensions, ensuring that the image is not deformed.
Second, the technical advantages of thermal CTP
1. Improve production efficiency
Compared with the traditional CTF process, the thermal CTP digital direct plate making has been simplified in the whole process, eliminating the need for manual imposition, printing, revision, and grinding, which shortens the preparation time and faster overprinting. More time-saving, higher overprint accuracy, greatly improving production efficiency.
The thermal positive plate material and the outer drum type roller design ensure the stress deformation of the plate material and ensure the data to image transfer more accurately under the high speed rotation of 600r/s. At present, the plate exposure thresholds provided by the market are all around 120μJ/cm2. The latest imported laser power of the 800 series machines is up to tens of watts, and the energy per unit area per square centimeter is up to 150μJ, which fully guarantees the plate exposure. It can realize the production efficiency of 16~22 sheets of the fourth edition (2540dpi) per hour, and the quality of the printing plate reaches the international level.
2. Low cost
The domestic CTP plate industry has been completed, and the thermal plate manufacturers represented by Henan Erjiao and Sichuan Juguang are currently performing well in the market. The domestic production of plates has been promoted, and the price of CTP plates has been falling. . At present, the cost of finished products of CTP printing plates in individual provinces and cities has been significantly lower than the comprehensive cost of PS plates and films in the traditional CTF process. This advantage is more obvious in printing enterprises with short-run business.
The renewal and replacement of the original process by CTP has caused many losses and wastes caused by unstable process quality to be basically curbed in the past, which is a blessing for printing companies.
Extremely long laser life and flexible laser replacement conditions. The lifetime of the thermal laser is 5000-8000h, which refers to the working time at the highest energy output of the laser. In the daily plate exposure process, it is not necessary to drive the laser energy to the maximum value. Moreover, the laser is turned on only at the beginning of the exposure, and the laser is turned off immediately after the exposure is completed. Even if the warranty period is exceeded, if the laser of the customer is damaged, Zhou Jin Technology only accepts the cost of the laser itself, and if the individual laser is damaged, it does not need to be replaced. The entire optical module replaces only the single laser that has been damaged, greatly reducing maintenance costs for the user. At present, all the introduction of Zhou Jin Technology enjoys a series of CTP systems can get 5000 to 8000 working hours laser warranty.
On the contrary, the violet laser CTP laser has lower energy and ideal wavelength, but the laser component repair and replacement is not flexible enough. In the case of the violet laser CTP device, all the laser components need to be replaced in case of failure. 100,000 yuan, but also includes high travel service fees. At present, the thermal technology can replace the laser components separately. The cost of replacing a laser with a foreign thermal CTP manufacturer is about 10,000 yuan. At present, Zhou Jin Technology has replaced its original imported laser with about 0.6 million yuan.
3. High quality prints
Because the laser energy and the diameter of the laser beam are variable, users can choose several different resolutions such as 1200dpi, 2400dpi, 2540dpi, etc. according to the application. Under this technology, the standard output precision of Zhoujin Technology enjoy 800 is 1200~2540dpi. A variety of output accuracy for the user to choose, and provide more than 175 lines of AM screening technology. The dot can easily achieve 1% to 99% accurate reduction, and 1% to 99% of the dots on the 175-300 line are superior to the violet laser technology, and this difference can be clearly expressed on the printed product.
Third, the future development of CTP
The development and advancement of CTP applications stems from its leading technological advantages, which are superior to CTFs in terms of production efficiency and print quality. However, in addition to being more intensive in the newspaper industry, CTP has not shown its huge advantages in the commercial and packaging fields, which is due to the industrial value chain of the Chinese printing industry. In Europe, prepress design, plate making and printing are almost all done in the same printing enterprise. In China, the market structure is completely different. There are independent design companies, film distribution companies and printing and processing enterprises in China, and the advantages of CTP in the domestic market. It cannot be fully highlighted. It is necessary to vigorously develop CTP to break this industrial value chain. This may be a huge challenge for all CTP system manufacturers in the domestic market. Whether in the newspaper industry or in the commercial or packaging industry, the advantages of CTP are in terms of timeliness, the disadvantages are still in cost, and the cost of CTP system plates is high, which makes the development and application of CTP greatly restricted.
Since the advent of Zhoujin Technology's products, we have determined to innovate independently, create a national brand, and tailor the CTP system for domestic users. Now we have already entered the market to enjoy the 800 series and 600 series, with its high quality, high efficiency and low. The cost has been recognized by users, and the 1100 series has entered the small-scale trial production stage, and the new products will be launched in the domestic market in September 2008. Domestic thermal CTP plates have achieved breakthrough results, such as Sichuan Juguang and Henan Erjiao have been able to provide high-quality and low-cost thermal positive CTP plates in batches. With the rapid development of the domestic printing industry, it is believed that the digitalization process of commercial printing and packaging printing is an unstoppable technology trend. The introduction and use of CTP will further promote the development of commercial packaging digitalization.