CTP technology has broken through barriers to technological development and has become a practical platemaking technology. However, CTP technology has not been able to support a well-recognized system like the PS version technology, but there have been technical differences since its inception. So far, there is no uniform standard for CTP technology. Photosensitivity, thermal sensitivity, and CTcP are noisy. Among them, various technologies are fully advocating their own advantages, and they are extremely devalued by other technologies. Users are also confused: what kind of technology introduction makes people feel very reasonable, it will become a development trend, the result is much more, users are even more uncertain. We previously discussed why CTP technology is good for everyone, but promotion is not effective. Apart from consumables price issues, concept change issues, and the construction of digital workflows, technology inconsistency is also an important reason. Here, we may objectively analyze the advantages and disadvantages of various technologies.
Silver Salt Edition
At present, there are three main types of CTP technology, namely the photosensitive, thermal and CTcP that have already been mentioned above. The birth of CTP technology originated from the film technology. Therefore, in 1995, CTP technology was just born, the main application is the photosensitive technology, both through the laser scanning exposure of photosensitive materials on the plate, which achieved the purpose of computer-direct plate. Although the photosensitivity of the photosensitive plate was different at the time, the photosensitivity mechanism was not the same, but the core photosensitive materials were silver halides. Therefore, this generation of CTP can be collectively referred to as the silver salt version. Silver salt version of the biggest advantage is the speed of light. So far, the silver salt version is still the fastest photosensitive material, whether it is a thermal plate or a violet laser polymer plate, it is hard to see in terms of speed.
However, the deficiency of the silver salt version is also very prominent. First of all, since the silver salt version needs silver salt as a light-sensitive material, and silver itself belongs to a precious metal, the silver salt version has always been highly valued. Moreover, the high photographic speed of the silver salt version is both an advantage and an unfavorable aspect. Too high photospeed requires that silver salt must be processed in a dark room, and the preservation of the plate must be strictly protected from light. As long as there is a slight difference, the expensive CTP plate will become waste aluminum. This gives the plate work band. It's quite a bit difficult. Third, the printability of the silver salt version is not very good, there are also certain problems with the resistance to India, and there are certain requirements for the ink. Fourth, the silver salt version of the development process will bring toxic waste, which is inconsistent with the international trend of emphasizing environmental protection. At present, although there are still companies that use silver salts, their scope of application has become narrower and narrower, and this technology has already withdrawn from the ranks of CTP mainstream technology.
Thermal Technology
In order to solve the silver salt version of the existence of expensive, difficult to save and other issues, people began to find new ways to solve the CTP technology. Thermal technology came into being.
The thermal technology is a big concept and the way it is implemented is also varied. At present, the main thermal CTP technologies include thermal curing technology, thermal decomposition technology, and heat-free processing technology. The lasers used in these technologies are all infrared lasers, but the imaging mechanism is different. The heat-sensitive curing technology uses a laser beam scan to photopolymerize the photosensitive layer of the dot portion. In the developing process, the reacting photosensitive layer is insoluble, and the photosensitive layer that is not scanned by the laser beam dissolves. The imaging mechanism of the thermo-decomposition technique is the inverse of the decomposition reaction of the laser beam. In the development process, the reacting photosensitive layer is dissolved, and the photosensitive layer that is not scanned by the laser beam is insoluble. The heat-free technology eliminates the need to develop printed information by melting it into a hydrophilic silicon layer using a thermal laser beam.
Either way, there is no silver salt component in the photosensitive material of the thermal plate. This fundamentally solved the issue of expensive plate materials. Although the prices of thermal plates currently on the market are still high, such prices are not a true reflection of manufacturing costs. From a development perspective, the overall price of the thermal plate should be close to the price of the widely used conventional PS plate.
The thermal exposure light source of the thermal plate is a thermal laser. Under normal storage conditions, the photosensitive layer of the thermal plate does not change. Therefore, the thermal plate should be stored without any problems, and the operation of the thermal plate is required. It can be done in the bright room, which is a leap. Although users are often faced with the problem of thermal plate failure, this is caused by the process control of the plate material manufacturing company during the process of preparing the sensitizer, and has nothing to do with the technical approach.
Thermal technology also has certain problems. The first is the complexity of the system. The thermal CTP technology itself is more and more, the polymer system that can realize the thermal plate making purpose is more, and there is no technology in the field of thermal CTP, can get everyone like the 215 sensitizer used in the traditional PS plate With common approval, all production companies also have their own opinions and do not show weaknesses. This brings a lot of trouble to the user's choice. In addition, the exposure speed of the thermal plate is relatively slow, which also limits the application of the thermal technology to some extent. It is also known that the requirements for the development conditions of the thermal plate, especially the temperature requirements, are very severe. Once the temperature exceeds the specified development temperature, the photosensitive layer may be completely dissolved and the plate becomes a “white plateâ€.
Despite some problems, the thermal technology still occupies a dominant position in the CTP market with its low price of consumables and a relatively relaxed operating environment. It can be said that before the purple laser technology and CTcP technology matured, there was no competitor for the thermal CTP technology in the market, and there was only competition between the manufacturers of thermal sensitive devices and different thermal plate manufacturers. .
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.
Traditional Plate Computer Technology
There are three kinds of computer-to-plate technologies using traditional media, including CTcP technology developed by BasysPrint, CTuP technology developed by Esko, and inkjet CTP technology launched by some domestic companies. The promotion of the first two technologies is relatively satisfactory. The inkjet CTP technology is rarely used because of its own problems.
If only from the consideration of the plate material, the use of traditional plate CTP system is undoubtedly the most competitive advantage. As soon as this technology emerged, it was applauded by many traditional media companies. This situation was particularly evident in China. It is fair to say that the market for computer-to-plate technology for traditional media should be faster, but the actual situation is far from ideal. The reason for this may be the lack of propaganda on the one hand. After all, companies that introduced thermal CTP technology and companies that introduced violet-laser CTP technology are companies that play a significant role in the printing industry. However, the research and production enterprises of traditional media CTP technology have to be stronger than those of the previous companies. A lot weaker. On the other hand, it may also be that there are still some problems with this technology, but companies that introduce this technology are not willing to easily disclose their shortcomings. For example, the current exposure of the traditional media CTP technology is based on mechanical positioning, rather than optical positioning using thermal devices and violet laser devices. This is puzzling, and the manufacturer has not given any explanation. For another example, the current traditional plate CTP technology uses a flat plate format rather than a faster drum design. In this regard, equipment manufacturers also did not give a reasonable explanation.
Based on the above analysis, we can make such a judgment: At present, the CTP market is dominated by the thermal technology, but this technology is experiencing a strong impact of the new photosensitive technology and the traditional plate CTP technology. In the next few years, there will be no qualitative changes in the coexistence of various technologies other than silver salt technology. The overall development trend of the market structure should be more balanced and it is very difficult to happen.
In particular, the new photosensitive technology does not refer to violet laser technology alone. There is no end to the development of technology, so no one dares to assert whether UV laser generators will emerge in the future. If one day there really was a UV laser generator, the current CTP market pattern will definitely be completely broken. Maybe at that time, the CTP market would really return to the world.
Silver Salt Edition
At present, there are three main types of CTP technology, namely the photosensitive, thermal and CTcP that have already been mentioned above. The birth of CTP technology originated from the film technology. Therefore, in 1995, CTP technology was just born, the main application is the photosensitive technology, both through the laser scanning exposure of photosensitive materials on the plate, which achieved the purpose of computer-direct plate. Although the photosensitivity of the photosensitive plate was different at the time, the photosensitivity mechanism was not the same, but the core photosensitive materials were silver halides. Therefore, this generation of CTP can be collectively referred to as the silver salt version. Silver salt version of the biggest advantage is the speed of light. So far, the silver salt version is still the fastest photosensitive material, whether it is a thermal plate or a violet laser polymer plate, it is hard to see in terms of speed.
However, the deficiency of the silver salt version is also very prominent. First of all, since the silver salt version needs silver salt as a light-sensitive material, and silver itself belongs to a precious metal, the silver salt version has always been highly valued. Moreover, the high photographic speed of the silver salt version is both an advantage and an unfavorable aspect. Too high photospeed requires that silver salt must be processed in a dark room, and the preservation of the plate must be strictly protected from light. As long as there is a slight difference, the expensive CTP plate will become waste aluminum. This gives the plate work band. It's quite a bit difficult. Third, the printability of the silver salt version is not very good, there are also certain problems with the resistance to India, and there are certain requirements for the ink. Fourth, the silver salt version of the development process will bring toxic waste, which is inconsistent with the international trend of emphasizing environmental protection. At present, although there are still companies that use silver salts, their scope of application has become narrower and narrower, and this technology has already withdrawn from the ranks of CTP mainstream technology.
Thermal Technology
In order to solve the silver salt version of the existence of expensive, difficult to save and other issues, people began to find new ways to solve the CTP technology. Thermal technology came into being.
The thermal technology is a big concept and the way it is implemented is also varied. At present, the main thermal CTP technologies include thermal curing technology, thermal decomposition technology, and heat-free processing technology. The lasers used in these technologies are all infrared lasers, but the imaging mechanism is different. The heat-sensitive curing technology uses a laser beam scan to photopolymerize the photosensitive layer of the dot portion. In the developing process, the reacting photosensitive layer is insoluble, and the photosensitive layer that is not scanned by the laser beam dissolves. The imaging mechanism of the thermo-decomposition technique is the inverse of the decomposition reaction of the laser beam. In the development process, the reacting photosensitive layer is dissolved, and the photosensitive layer that is not scanned by the laser beam is insoluble. The heat-free technology eliminates the need to develop printed information by melting it into a hydrophilic silicon layer using a thermal laser beam.
Either way, there is no silver salt component in the photosensitive material of the thermal plate. This fundamentally solved the issue of expensive plate materials. Although the prices of thermal plates currently on the market are still high, such prices are not a true reflection of manufacturing costs. From a development perspective, the overall price of the thermal plate should be close to the price of the widely used conventional PS plate.
The thermal exposure light source of the thermal plate is a thermal laser. Under normal storage conditions, the photosensitive layer of the thermal plate does not change. Therefore, the thermal plate should be stored without any problems, and the operation of the thermal plate is required. It can be done in the bright room, which is a leap. Although users are often faced with the problem of thermal plate failure, this is caused by the process control of the plate material manufacturing company during the process of preparing the sensitizer, and has nothing to do with the technical approach.
Thermal technology also has certain problems. The first is the complexity of the system. The thermal CTP technology itself is more and more, the polymer system that can realize the thermal plate making purpose is more, and there is no technology in the field of thermal CTP, can get everyone like the 215 sensitizer used in the traditional PS plate With common approval, all production companies also have their own opinions and do not show weaknesses. This brings a lot of trouble to the user's choice. In addition, the exposure speed of the thermal plate is relatively slow, which also limits the application of the thermal technology to some extent. It is also known that the requirements for the development conditions of the thermal plate, especially the temperature requirements, are very severe. Once the temperature exceeds the specified development temperature, the photosensitive layer may be completely dissolved and the plate becomes a “white plateâ€.
Despite some problems, the thermal technology still occupies a dominant position in the CTP market with its low price of consumables and a relatively relaxed operating environment. It can be said that before the purple laser technology and CTcP technology matured, there was no competitor for the thermal CTP technology in the market, and there was only competition between the manufacturers of thermal sensitive devices and different thermal plate manufacturers. .
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.
Traditional Plate Computer Technology
There are three kinds of computer-to-plate technologies using traditional media, including CTcP technology developed by BasysPrint, CTuP technology developed by Esko, and inkjet CTP technology launched by some domestic companies. The promotion of the first two technologies is relatively satisfactory. The inkjet CTP technology is rarely used because of its own problems.
If only from the consideration of the plate material, the use of traditional plate CTP system is undoubtedly the most competitive advantage. As soon as this technology emerged, it was applauded by many traditional media companies. This situation was particularly evident in China. It is fair to say that the market for computer-to-plate technology for traditional media should be faster, but the actual situation is far from ideal. The reason for this may be the lack of propaganda on the one hand. After all, companies that introduced thermal CTP technology and companies that introduced violet-laser CTP technology are companies that play a significant role in the printing industry. However, the research and production enterprises of traditional media CTP technology have to be stronger than those of the previous companies. A lot weaker. On the other hand, it may also be that there are still some problems with this technology, but companies that introduce this technology are not willing to easily disclose their shortcomings. For example, the current exposure of the traditional media CTP technology is based on mechanical positioning, rather than optical positioning using thermal devices and violet laser devices. This is puzzling, and the manufacturer has not given any explanation. For another example, the current traditional plate CTP technology uses a flat plate format rather than a faster drum design. In this regard, equipment manufacturers also did not give a reasonable explanation.
Based on the above analysis, we can make such a judgment: At present, the CTP market is dominated by the thermal technology, but this technology is experiencing a strong impact of the new photosensitive technology and the traditional plate CTP technology. In the next few years, there will be no qualitative changes in the coexistence of various technologies other than silver salt technology. The overall development trend of the market structure should be more balanced and it is very difficult to happen.
In particular, the new photosensitive technology does not refer to violet laser technology alone. There is no end to the development of technology, so no one dares to assert whether UV laser generators will emerge in the future. If one day there really was a UV laser generator, the current CTP market pattern will definitely be completely broken. Maybe at that time, the CTP market would really return to the world.
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