Purple laser technology In the CTP market, light-sensitive technology was once into the cold, but the emergence of violet laser generators changed this situation. The violet laser generator was first developed by Japan's Nichia Corporation. The first application of this laser is that home appliances are not printed. In the home appliance industry, violet lasers are also called blue lasers. DVD lasers currently on the market use such lasers. Since the wavelength of the violet laser is close to that of the conventional PS plate, some CTP equipment manufacturers also hope to transplant this technology into the printing industry. The company that first introduced purple laser CTP equipment is mainly Agfa and Fujifilm. At this year's Drupa exhibition, there have been more than 10 companies that have launched violet laser CTP equipment, and some other plate manufacturers have introduced equipment matching. The media. According to reports, in addition to Japan and Asia, Japan's Sony, Panasonic, Sanyo, Toshiba and other companies are now involved in the development of purple laser generators. Violet laser generator has also greatly improved in the past few years, the latest reports show that the power of the violet laser generator has been developed from 5mW when it was just released to the current 60mW, and this development is far from reaching the end. At present, the violet laser plate still belongs to the strictly confidential technology of various production companies, and the specific technical details are unknown. From some introductions, it can be found that the currently launched violet laser plate is mainly a photopolymerization plate, so this plate should be a negative plate. When the exposure area is less than 50%, this plate is definitely faster than the positive plate. In addition, the sensitizer of this plate is generally a non-silver salt polymer photographic material, so its storage and handling conditions are much looser than the silver salt plate, and it can be operated in the yellow light protection room. This kind of operating environment is consistent with the operating environment of the traditional PS version, so it is easier for operators who are accustomed to using traditional plates to accept this technology. According to the plate manufacturer, this plate is developed using a weak alkaline solution, and the printability is close to that of a conventional PS plate. Some manufacturers of purple laser CTP equipment, such as Fujifilm of Japan, also stated that the currently available violet laser CTP equipment can be upgraded in the future. From the above considerations, Purple Laser CTP is undoubtedly a very competitive technology. Although it is not good to say that this technology will completely replace the thermal technology, its strong impact on the thermal technology is positive. Reprinted from: Printing Technology
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