First, we must first understand the development process of CTP Laser phototypes development to the 1990s, has made great changes in the prepress system, text entry, photo scanning, graphic mixing and other prepress most processes have been digitized However, the plate making process has always stayed in the simulation stage, which has become the bottleneck of the overall digital development of the entire prepress system. The emergence of the CTP direct plate making technology has injected new vitality into the prepress digitalization. Early visible platesetters mostly used visible light lasers. Therefore, most of the CTP plates at that time were silver plates with visible light. In early 1996, before the far-infrared lasers were used in CTP platesetters, the development of silver salt CTP plates was quite mature.
The far-infrared laser platemaking machine uses a thermal CTP plate. The thermal CTP plate has the advantages of high resolution, high printing resistance, bright room operation, and pollution-free. After it was introduced to the market, it was recognized by the industry; The mainstream of CTP is the silver salt system, but experts have already asserted that CTP will develop in the direction of a thermal CTP system. By 2000, almost all major plate manufacturers introduced new thermal CTP plates. Throughout the Drupa 2000 exhibition, thermal CTP plates have been developed to the stage of printing without any processing.
Although far-infrared laser platesetters and thermal CTP plates have been developed fairly well, they are not accepted by many newspaper printing companies because of the high price of the entire machine and the fact that the plate has not been made domestically. In 1999, EscherGrad first developed a CTP plate-making machine for violet laser imaging. It uses a violet laser diode and can operate under a bright yellow safety light. It has the advantages of high imaging speed, low light source cost, short laser wavelength, and is not easily divergent. , Easy to control, etc., so it is favored by many manufacturers. The violet laser plate making machine uses a violet-stained silver salt CTP plate, which brings a silver lining to the silver salt system. In addition, it is worth mentioning the use of ordinary PS version of the CTP direct plate-making system. The light source used in this system is the ultraviolet light used by the traditional printing machine, and the printing plate is the ordinary PS plate. The time for commercialization of this technology is not long. At present, there are only two companies in the world that can produce this direct platemaking machine. China's CTP technology started relatively late. Both the platesetter and the plates lag behind foreign counterparts. However, many domestic companies, such as: Chinese Academy of Sciences Photographic Chemistry Institute, Henan Second Glue, Beijing Normal University, Shanghai Printing Technology Institute, are also developing and developing domestic CTP machine and plate. According to reports, Hangzhou Dongfang Communication and Peking University Huatong have made prototypes of visible light laser CTP platesetters; the thermal plates developed by Beijing Normal University and Henan Dijiao have been successfully plated on the winning machine; the Chinese Academy of Sciences Sensitive Exhibition also trial production. Silver salt diffusion version of the experimental sample. In spite of this, the localization and commercialization of CTP equipment and plates will take some time. Second, why the newspaper printing plant to use the CTP direct plate-making system Newspaper publishing is always towards the news in the shortest time to see and print high-quality newspapers in the direction of development. Most of the domestic newspaper printing companies have achieved prepress digitalization, the editorial department and the printing factory have achieved networking, but the plate making process has become an obstacle to the development of the newspaper industry. The traditional plate making process adopts artificial imposition, the printing plate has a long time, labor intensity, and quality can not be guaranteed. For the monochrome version, the first version takes 15-20 minutes (5 minutes for the publication, 2-4 minutes for the punch, 5 minutes for the imposition, and 2 minutes for the imprint), and 10 minutes for each successive job. If you want to do a set of four editions of large newspapers, you need to use two PS versions, 1, 4 and 2 and 3 each. The platemaking needs at least 30 minutes. If it is a color version, you need to use 5 sheets. For the PS version, 1, 4, 4 color editions, 2 and 3 black and white editions, the plate making time is at least 60 minutes, so not only is the time long, the efficiency is low, more importantly is due to the light and the visual influence, the plate making quality is difficult Guarantee. If CTP is used for direct plate making, a set of four editions of large newspapers, it takes only 2 minutes for a monochrome version, more than 7 minutes for a color version, and 60 sheets/hour for a plate making speed. In the meantime, at least 30 minutes can be postponed by the editorial department, which can increase the timeliness of newspaper news.
The CRP system is a new process controlled by the computer. This process produces sharp dots, which can avoid fog and dot adhesion and improve the quality of printed products. In addition, the CTP system can shorten the production cycle, save labor, and more importantly, You can save money. With the continuous progress of CTP technology, the production of CTP plates will gradually increase, and the prices of plates will gradually decrease. Especially after the localization of CTP plates, the prices will become lower and lower (just twice as much as ordinary PS plates now. low). In addition, the CTP plate is more resistant to Indian forces than the ordinary PS plate, a CTP plate with a resistance force of up to 300,000 printed, up to 1 million printing after baking, and the resistance of ordinary imported PS plate India Force is printing about 100,000 copies. If the circulation of newspapers reaches 300,000 copies, the use of ordinary printing plates requires the replacement of several sets of printing plates. For example, three sets of printing plates are needed. The cost comparison between traditional process and CTP process is as follows:
Calculated under the usual circumstances of one month's plate-making consumables consumption, 100 sheets of four-fold format monochromatic film are produced each day. 50 sheets of PS format with facing format are required, roughly estimating the difference of 焉 that is about 80,000 yuan. If the consumption of four films per day reaches 200, the difference between the two process months will be even greater. In other words, the use of CTP direct plate-making can save the newspaper printing company millions of dollars each year, which is why newspaper printing companies have to go to the CTP system.
Third, the newspaper printing plant has the basic conditions for the introduction of the CTP system In addition to funding factors, in addition to the introduction of the CTP system, but also need to examine whether the factory's hardware facilities and technical capabilities to meet the requirements of the CTP system.
1. The CTP system requires the computer to imposition the entire page. To achieve this, the digitization of advertising film has always been a difficult problem because more than 80% of the advertisements provide color separations. In the traditional process, the position of the advertising film is pre-empted at the time of typesetting, and before the printing is performed, the imposing master will collage the advertisement film to the corresponding position. This is not only a waste of time, it does not meet the requirements of full-page imposition output. In order to meet this requirement, it is necessary to introduce a scanner with dot duplication and four-color registration. In August 2000, our newspaper printing plant invested millions in the introduction of a CopyDot scanner, the EskoScan 2636, produced by the Danish Baolu Defu Co., Ltd. This machine not only has outlet copying, four-color registering, but also has Dirty network, automatic recognition of the original and other functions, can fully guarantee the CTP system full page imposition output requirements.
2. CTP system requires a large version of the software. Before the launch, the CTP system requires that two or four open pages or four open pages be combined and printed together in a certain layout along with the middle seam. At present, we use the Huaguang typesetting software "Chaosi", may not have this function, the need for professional imposition software, of course, some CTP system will configure the imposition version of the function. Beijing Daily Press chose to use the Wenhe software from Beijing University Founder.
3. Whether the network facilities meet the requirements of the CTP system. In the entire system, a high-speed computer network system is also needed for the transmission of various types of information, and a server or a minicomputer is also required as a network server for storing information. In August 2000, we replaced the more advanced and faster network servers in the class-setting workshop. We believe that our network facilities can meet the requirements of the CTP system.
4. The current RIP can meet the requirements of the CTP. The RIP currently used by our printing factory is Hua Li's Power RIP. At present, there is no report on the connection between the CTP direct plate-making machine and Huaguang RIP. At least our current RIP can continue to be used after the introduction of CTP. Wait until the relevant expert tests before you can determine. The printing house of the Beijing Daily used the Founder's NTRIP at a price of around 100,000 yuan. 5. Traditional proofing must be improved. The CTP system requires proofing using digital proofing. The CTP equipment produces a printing plate that is directly used for printing. From the time and benefit point of view, no errors are allowed in the layout, and the mistakes must be eliminated before the publication. Digital proofing with low cost, high speed, and high accuracy is required to provide proofreading proofs. Beijing Daily Press chose the HP8500 color laser printer. We now rely on two black and white inkjet printers for proofing. However, we cannot keep up with the pace. After introducing the CTP system, we must re-allocate digital proofing equipment.
6. Can employees' skills meet the requirements of the CTP system? Direct platemaking simplifies the process flow and improves the production efficiency. It also reduces the chances of people seeing samples and checking for errors. Once the plate is finished, it is discovered that the whole plate must be redone. Now the CTP plate is It is much higher than the general PS version, which virtually increases costs. Therefore, a high sense of responsibility is required during the operation of the CTP system, which also imposes higher requirements on the skills and qualities of the employees.
7. Is it possible to accommodate employees who are left idle due to a reduction in process flow. The CTP system eliminates processes such as film processing, imposition, and printing, and improves work efficiency. The work done by the original 78 people can now be completed by only two or three people. In this way, the prepress process may have 1 The 3/3 employees are free. This is also a problem that needs attention.
If all of the above conditions are met, then the basic conditions for introducing a CTP system are basically met. However, judging from the current situation, our newspaper printing company only meets the requirements of the CTP system in terms of full-page output and network facilities.
Fourth, the newspaper printing plant should introduce what kind of CTP direct plate-making system 1. Drawing on the experience of the brothers newspaper. According to reports, newspaper publishers such as Yangcheng Evening News, Beijing Daily, Hubei Daily, and Wenhui Xinmin have successively successfully introduced and used the CTP system. The Yangcheng Evening News printing house has introduced two CTP platesetters and an American Optronics Aurora system. An AGFA Polaris CTP system. Beijing Daily Press Printing Co., Ltd. introduced the internal agitating plate-making machine of the Danish Baoluodefu. It operates in a full-light room and uses thermal plates. After the above several plate-making machines were put into production, they all brought considerable benefits to their respective newspaper printing houses.
2. Choose from the structure. The flat panel CTP has a limited exposure range and a simple structure. The inner drum type CTP system is not susceptible to vibrations regardless of whether it is a large format or a small format, whether thin or thick. In addition, the work efficiency of the internal agitator is relatively high. some. At present, there are many newspaper-type products using platform-type and in-drum CTP platesetters.
3. Select from the plate. Both the photosensitive and thermal systems have their own advantages and disadvantages. Relatively speaking, the silver salt system has a certain basis in the country, and the process is familiar with it. Therefore, the newspaper printing factory may first adopt the silver salt CTP plate. And photosensitive system CTP platesetter.
From another perspective, whether or not CTP plates are domestically produced is an important factor in the development of CTP systems in China. If you rely on imported media alone, you can buy two direct platemakers in only one year. According to relevant information, China has developed a pattern of silver salt diffusion and thermal-type CTP plates. Therefore, which type of CTP plate is first commercialized at home in large quantities, and which type of CTP system is easily accepted by the majority of companies, if we are to introduce a CTP system, the light source can be replaced to apply a different version. Material CTP system.
4. Choose from the perspective of national conditions. The CTP direct platemaking system is a CTP direct platemaking system that is more in line with China's national conditions. The CTCP plate making machine uses the ordinary PS version. This has extremely realistic meaning today when the CTP plate has not yet been manufactured. However, the sensitivity of the ordinary PS plate used by the CTCP cannot be too low, that is, it is not every kind of ordinary PS version can be used for CTCP system. It is understood that the common PS version jointly produced by China and India and Fujitsu can better meet the needs of the CTCP system.
5. Select from the characteristics of the newspaper itself. On the one hand, the newspaper is a readable product rather than an exquisite one. Usually, the number of screens is less than 100 lines per inch, and the color paper is not more than 120 lines per inch. Therefore, the plate used for printing is The resolution can be lower, and the resolution of the platesetter can be lower. On the other hand, the newspaper has a strong timeliness. Under the circumstances that the editorial department was late in writing and the boot time could not be changed, it required the platemaking machine's plate making speed to be faster. From the current situation, the plate-type visible light laser CTP system has the fastest plate making speed. Taking a 640 mm×840 mm frame as an example, 280 plates per hour can be produced at 1016 dpi.
From the above perspectives, our optional CTP system
The far-infrared laser platemaking machine uses a thermal CTP plate. The thermal CTP plate has the advantages of high resolution, high printing resistance, bright room operation, and pollution-free. After it was introduced to the market, it was recognized by the industry; The mainstream of CTP is the silver salt system, but experts have already asserted that CTP will develop in the direction of a thermal CTP system. By 2000, almost all major plate manufacturers introduced new thermal CTP plates. Throughout the Drupa 2000 exhibition, thermal CTP plates have been developed to the stage of printing without any processing.
Although far-infrared laser platesetters and thermal CTP plates have been developed fairly well, they are not accepted by many newspaper printing companies because of the high price of the entire machine and the fact that the plate has not been made domestically. In 1999, EscherGrad first developed a CTP plate-making machine for violet laser imaging. It uses a violet laser diode and can operate under a bright yellow safety light. It has the advantages of high imaging speed, low light source cost, short laser wavelength, and is not easily divergent. , Easy to control, etc., so it is favored by many manufacturers. The violet laser plate making machine uses a violet-stained silver salt CTP plate, which brings a silver lining to the silver salt system. In addition, it is worth mentioning the use of ordinary PS version of the CTP direct plate-making system. The light source used in this system is the ultraviolet light used by the traditional printing machine, and the printing plate is the ordinary PS plate. The time for commercialization of this technology is not long. At present, there are only two companies in the world that can produce this direct platemaking machine. China's CTP technology started relatively late. Both the platesetter and the plates lag behind foreign counterparts. However, many domestic companies, such as: Chinese Academy of Sciences Photographic Chemistry Institute, Henan Second Glue, Beijing Normal University, Shanghai Printing Technology Institute, are also developing and developing domestic CTP machine and plate. According to reports, Hangzhou Dongfang Communication and Peking University Huatong have made prototypes of visible light laser CTP platesetters; the thermal plates developed by Beijing Normal University and Henan Dijiao have been successfully plated on the winning machine; the Chinese Academy of Sciences Sensitive Exhibition also trial production. Silver salt diffusion version of the experimental sample. In spite of this, the localization and commercialization of CTP equipment and plates will take some time. Second, why the newspaper printing plant to use the CTP direct plate-making system Newspaper publishing is always towards the news in the shortest time to see and print high-quality newspapers in the direction of development. Most of the domestic newspaper printing companies have achieved prepress digitalization, the editorial department and the printing factory have achieved networking, but the plate making process has become an obstacle to the development of the newspaper industry. The traditional plate making process adopts artificial imposition, the printing plate has a long time, labor intensity, and quality can not be guaranteed. For the monochrome version, the first version takes 15-20 minutes (5 minutes for the publication, 2-4 minutes for the punch, 5 minutes for the imposition, and 2 minutes for the imprint), and 10 minutes for each successive job. If you want to do a set of four editions of large newspapers, you need to use two PS versions, 1, 4 and 2 and 3 each. The platemaking needs at least 30 minutes. If it is a color version, you need to use 5 sheets. For the PS version, 1, 4, 4 color editions, 2 and 3 black and white editions, the plate making time is at least 60 minutes, so not only is the time long, the efficiency is low, more importantly is due to the light and the visual influence, the plate making quality is difficult Guarantee. If CTP is used for direct plate making, a set of four editions of large newspapers, it takes only 2 minutes for a monochrome version, more than 7 minutes for a color version, and 60 sheets/hour for a plate making speed. In the meantime, at least 30 minutes can be postponed by the editorial department, which can increase the timeliness of newspaper news.
The CRP system is a new process controlled by the computer. This process produces sharp dots, which can avoid fog and dot adhesion and improve the quality of printed products. In addition, the CTP system can shorten the production cycle, save labor, and more importantly, You can save money. With the continuous progress of CTP technology, the production of CTP plates will gradually increase, and the prices of plates will gradually decrease. Especially after the localization of CTP plates, the prices will become lower and lower (just twice as much as ordinary PS plates now. low). In addition, the CTP plate is more resistant to Indian forces than the ordinary PS plate, a CTP plate with a resistance force of up to 300,000 printed, up to 1 million printing after baking, and the resistance of ordinary imported PS plate India Force is printing about 100,000 copies. If the circulation of newspapers reaches 300,000 copies, the use of ordinary printing plates requires the replacement of several sets of printing plates. For example, three sets of printing plates are needed. The cost comparison between traditional process and CTP process is as follows:
Calculated under the usual circumstances of one month's plate-making consumables consumption, 100 sheets of four-fold format monochromatic film are produced each day. 50 sheets of PS format with facing format are required, roughly estimating the difference of 焉 that is about 80,000 yuan. If the consumption of four films per day reaches 200, the difference between the two process months will be even greater. In other words, the use of CTP direct plate-making can save the newspaper printing company millions of dollars each year, which is why newspaper printing companies have to go to the CTP system.
Third, the newspaper printing plant has the basic conditions for the introduction of the CTP system In addition to funding factors, in addition to the introduction of the CTP system, but also need to examine whether the factory's hardware facilities and technical capabilities to meet the requirements of the CTP system.
1. The CTP system requires the computer to imposition the entire page. To achieve this, the digitization of advertising film has always been a difficult problem because more than 80% of the advertisements provide color separations. In the traditional process, the position of the advertising film is pre-empted at the time of typesetting, and before the printing is performed, the imposing master will collage the advertisement film to the corresponding position. This is not only a waste of time, it does not meet the requirements of full-page imposition output. In order to meet this requirement, it is necessary to introduce a scanner with dot duplication and four-color registration. In August 2000, our newspaper printing plant invested millions in the introduction of a CopyDot scanner, the EskoScan 2636, produced by the Danish Baolu Defu Co., Ltd. This machine not only has outlet copying, four-color registering, but also has Dirty network, automatic recognition of the original and other functions, can fully guarantee the CTP system full page imposition output requirements.
2. CTP system requires a large version of the software. Before the launch, the CTP system requires that two or four open pages or four open pages be combined and printed together in a certain layout along with the middle seam. At present, we use the Huaguang typesetting software "Chaosi", may not have this function, the need for professional imposition software, of course, some CTP system will configure the imposition version of the function. Beijing Daily Press chose to use the Wenhe software from Beijing University Founder.
3. Whether the network facilities meet the requirements of the CTP system. In the entire system, a high-speed computer network system is also needed for the transmission of various types of information, and a server or a minicomputer is also required as a network server for storing information. In August 2000, we replaced the more advanced and faster network servers in the class-setting workshop. We believe that our network facilities can meet the requirements of the CTP system.
4. The current RIP can meet the requirements of the CTP. The RIP currently used by our printing factory is Hua Li's Power RIP. At present, there is no report on the connection between the CTP direct plate-making machine and Huaguang RIP. At least our current RIP can continue to be used after the introduction of CTP. Wait until the relevant expert tests before you can determine. The printing house of the Beijing Daily used the Founder's NTRIP at a price of around 100,000 yuan. 5. Traditional proofing must be improved. The CTP system requires proofing using digital proofing. The CTP equipment produces a printing plate that is directly used for printing. From the time and benefit point of view, no errors are allowed in the layout, and the mistakes must be eliminated before the publication. Digital proofing with low cost, high speed, and high accuracy is required to provide proofreading proofs. Beijing Daily Press chose the HP8500 color laser printer. We now rely on two black and white inkjet printers for proofing. However, we cannot keep up with the pace. After introducing the CTP system, we must re-allocate digital proofing equipment.
6. Can employees' skills meet the requirements of the CTP system? Direct platemaking simplifies the process flow and improves the production efficiency. It also reduces the chances of people seeing samples and checking for errors. Once the plate is finished, it is discovered that the whole plate must be redone. Now the CTP plate is It is much higher than the general PS version, which virtually increases costs. Therefore, a high sense of responsibility is required during the operation of the CTP system, which also imposes higher requirements on the skills and qualities of the employees.
7. Is it possible to accommodate employees who are left idle due to a reduction in process flow. The CTP system eliminates processes such as film processing, imposition, and printing, and improves work efficiency. The work done by the original 78 people can now be completed by only two or three people. In this way, the prepress process may have 1 The 3/3 employees are free. This is also a problem that needs attention.
If all of the above conditions are met, then the basic conditions for introducing a CTP system are basically met. However, judging from the current situation, our newspaper printing company only meets the requirements of the CTP system in terms of full-page output and network facilities.
Fourth, the newspaper printing plant should introduce what kind of CTP direct plate-making system 1. Drawing on the experience of the brothers newspaper. According to reports, newspaper publishers such as Yangcheng Evening News, Beijing Daily, Hubei Daily, and Wenhui Xinmin have successively successfully introduced and used the CTP system. The Yangcheng Evening News printing house has introduced two CTP platesetters and an American Optronics Aurora system. An AGFA Polaris CTP system. Beijing Daily Press Printing Co., Ltd. introduced the internal agitating plate-making machine of the Danish Baoluodefu. It operates in a full-light room and uses thermal plates. After the above several plate-making machines were put into production, they all brought considerable benefits to their respective newspaper printing houses.
2. Choose from the structure. The flat panel CTP has a limited exposure range and a simple structure. The inner drum type CTP system is not susceptible to vibrations regardless of whether it is a large format or a small format, whether thin or thick. In addition, the work efficiency of the internal agitator is relatively high. some. At present, there are many newspaper-type products using platform-type and in-drum CTP platesetters.
3. Select from the plate. Both the photosensitive and thermal systems have their own advantages and disadvantages. Relatively speaking, the silver salt system has a certain basis in the country, and the process is familiar with it. Therefore, the newspaper printing factory may first adopt the silver salt CTP plate. And photosensitive system CTP platesetter.
From another perspective, whether or not CTP plates are domestically produced is an important factor in the development of CTP systems in China. If you rely on imported media alone, you can buy two direct platemakers in only one year. According to relevant information, China has developed a pattern of silver salt diffusion and thermal-type CTP plates. Therefore, which type of CTP plate is first commercialized at home in large quantities, and which type of CTP system is easily accepted by the majority of companies, if we are to introduce a CTP system, the light source can be replaced to apply a different version. Material CTP system.
4. Choose from the perspective of national conditions. The CTP direct platemaking system is a CTP direct platemaking system that is more in line with China's national conditions. The CTCP plate making machine uses the ordinary PS version. This has extremely realistic meaning today when the CTP plate has not yet been manufactured. However, the sensitivity of the ordinary PS plate used by the CTCP cannot be too low, that is, it is not every kind of ordinary PS version can be used for CTCP system. It is understood that the common PS version jointly produced by China and India and Fujitsu can better meet the needs of the CTCP system.
5. Select from the characteristics of the newspaper itself. On the one hand, the newspaper is a readable product rather than an exquisite one. Usually, the number of screens is less than 100 lines per inch, and the color paper is not more than 120 lines per inch. Therefore, the plate used for printing is The resolution can be lower, and the resolution of the platesetter can be lower. On the other hand, the newspaper has a strong timeliness. Under the circumstances that the editorial department was late in writing and the boot time could not be changed, it required the platemaking machine's plate making speed to be faster. From the current situation, the plate-type visible light laser CTP system has the fastest plate making speed. Taking a 640 mm×840 mm frame as an example, 280 plates per hour can be produced at 1016 dpi.
From the above perspectives, our optional CTP system
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