1. The narrow sense CTP technology of the CTP system refers to computer offline plate making technology (Computer To Plate). The broad CTP system also includes Computer To Press (Computer To Press), Computer To Paper/print (Computer To Paper/print) and Computer To Proof (Computer Direct Proofing). In fact, the CTP system is a combination of digital prepress electronic processing technology and scanning output technology, which realizes the process of directly scanning and outputting the entire page layout on different media. This fundamentally changes the filming, plate making, and printing. This traditional printing process has enabled the development of printing technology to enter a new era of digitalization. The process of the CTP system is as follows:
Prepress digital system layout information → RIP → plate imagesetters → plates, prints, proofs.
At present, the CTP system has been promoted and applied abroad. A key factor in domestic development is whether the CTP plate can be made domestically? If you can afford it, you have to use it to find a way out.
Second, the computer off-line plate-making technology off-line computer plate-making technology is a computer produced good graphics, through the computer-controlled laser beam will be directly exported to the printing plate information, can be directly linked to the printing press for printing. The advantages are: rapid plate making, good quality, no change to the original printing equipment, retaining the original printing method, suitable for large-scale, high-speed, large-format printing, such as newspapers, packaging and so on.
The use of computer off-line plate-making technology first of all requires proficiency in the digital prepress system, including manuscript scanning color separation, image processing and group printing, document management, and film output. Also consider the following aspects:
1. Re-digitalization of foreign films: Since the entire process flow of computer off-line plate making technology is fully digitalized, external color separation films must also be re-scanned into digital files for large-scale editions.
2. Comprehensive color management: How to make digital proofing simulate the actual printing effect and match the screen display with printing is very critical, so we must consider the color management of the entire system. For example, the Heidelberg color management system uses a device-independent CIE LAB color space, which covers the entire visible color gamut, and defines a related profile for each device to describe the color characteristics of the device. Apple's operating system and Windows operating system all support Heidelberg's color management program.
3. Imposition: Since there is no longer any manual imposition process, all the information required for printing must be completely lined up by the imposition workstation to form an accurate and complete imposition.
Both PS and PDF files can be impositioned by the imposition workstation. Files of different sizes can also be tiled together, saving film.
Third, digital printing Digital printing includes computer-to-machine direct platemaking technology and computer direct printing technology. The development of plate and plate materials directly affects the development of printing machines. Digital printing can be divided into direct printing and indirect printing. And inkjet printing.
1. Direct printing: The printing plate is directly printed on the paper. Such as Agfa, Xeikon, IBM and other vendors provide products.
Take Xeikon's DCP/32 machine as an example. The principle is: After the RIP processed graphic information control laser, the laser beam emitted by the laser is directed to the organic semiconductor drum to image it, and then the fine toner is adsorbed thereon, forming a toner image on the drum, and the printed toner Heat cured on paper.
2. Indirect printing: Like a conventional offset press, it is transferred by a blanket cylinder. This digital press basically maintains the characteristics of the offset press. Heidelberg DI46, Israel Indigo E-Print1000, KBA 74Karat, and Czech 705CDI Dominant all belong to indirect printing digital presses.
Taking Indigo's E-Print 1000 model as an example, the printing part of this machine is similar to a printing unit of a sheet-fed offset printing press, including a plate cylinder, a blanket cylinder and an impression cylinder. Outside the plate cylinder is a special type of photoconductor material. During printing, the plate is scanned by a computer-controlled laser beam, a latent image is formed on the plate, and electronic ink of a corresponding color is then sprayed on the plate cylinder. At this time, the latent image absorbs ink, forms a monochrome image, and completes printing. The principle of multicolor printing is the same. The improved E-Printl000+ features a photo imaging plate that prints once and scans once. After each printing, the previously formed latent image is erased and it is necessary to rescan to form a new latent image. This plate can be reused.
3. Inkjet printing: The use of computer-controlled nozzles to direct ink jet on the substrate, is a non-printer without roller and the traditional printing is completely different printing. For example, the Sai Angel 624 digital printer, through computer control, ejects fine ink dots from nozzles to form images on substrates. The machine has a maximum of 8 nozzles, each nozzle has a printing width of 10.8 cm, a printing speed of 1500 cm/min, and an inkjet resolution of 240×240 dpi.
Digital presses are currently occupying the market of personalized and low-volume color printing, starting to compete with the market for small offset printing, and the integration of direct platemaking and printing presses is the development direction of future offset press dataization.
Fourth, digital proofing With the introduction of various professional color management software, the popularity of high-precision, large color gamut, low-cost printers, plus the emergence of a variety of printing paper that can simulate coated paper, digital proofing the various bottlenecks All have been broken, it has been accepted and recognized as a mature technology, and has brought convenience and speed to some leading technology platemaking companies. Of course, it is more important to adjust the front and back steps based on the stability of digital proofing to improve the overall color quality of prints.
Representative BESTCOLOR digital proofing, as a member of the world digital proofing family, has won numerous awards around the world for its high quality. BESTCOLOR introduces ICC color management into the production system so that it can be easily proofed with a certain printing standard. These standards are the world-famous European printing standards, the United States printing standards. In order to enable the proofing system to meet the domestic printing conditions, some parameters of the domestic printing environment have been specially formulated to meet the needs of domestic customers. The ICC files created using these standard proofs will represent a certain level of printing, and these standards can be easily digitized.
ICC-based color management uses a device-independent color description language, CIELAB, to establish the color parameters of the environment, so it is important to stabilize the printing process. In recent years, with the development of electronic color separation, spectrodensitometer, electronic engraving, and direct plate making, the process flow has become more and more simple and stable, the conditions for color management have been met, and digital proofing is the first to realize color management. One step will certainly bring greater economic benefits to the company.
V. Digital Printing Networking Due to the advent of the Internet, people can access information anywhere, anytime, and speed and accessibility bring value to printing. It has become the standard to complete more work in a shorter time. From the international perspective, digital printing has become the mainstream and the popularity of e-commerce. Printers have begun to integrate production with strict electronic workflows to provide services to customers.
On-demand printing, online printing, these new concepts of printed e-commerce must be based on the information management within the printing company. Only by doing a good job of informationization within the enterprise can we be in an invincible position in e-commerce in the Internet era.
The network and e-commerce technologies are changing with each passing day. In the face of new technologies, we are in the same starting line with printing companies in developed countries. The construction of a digital management system for printing companies is a difficult and complex system engineering. It is not only to build a computer network, but also to purchase a set of computer software. It is to rely on the technology and new management ideas and concepts of the network and e-commerce. Establish a modern business operation model.
The development of internet and e-commerce technology influences and changes our lives. We face opportunities and challenges. Only by changing our concepts, seizing opportunities, and courageously meeting challenges will we have the guarantee of survival and development. (Liu Yuxia) ("China Packaging News and Print Weekly")
Prepress digital system layout information → RIP → plate imagesetters → plates, prints, proofs.
At present, the CTP system has been promoted and applied abroad. A key factor in domestic development is whether the CTP plate can be made domestically? If you can afford it, you have to use it to find a way out.
Second, the computer off-line plate-making technology off-line computer plate-making technology is a computer produced good graphics, through the computer-controlled laser beam will be directly exported to the printing plate information, can be directly linked to the printing press for printing. The advantages are: rapid plate making, good quality, no change to the original printing equipment, retaining the original printing method, suitable for large-scale, high-speed, large-format printing, such as newspapers, packaging and so on.
The use of computer off-line plate-making technology first of all requires proficiency in the digital prepress system, including manuscript scanning color separation, image processing and group printing, document management, and film output. Also consider the following aspects:
1. Re-digitalization of foreign films: Since the entire process flow of computer off-line plate making technology is fully digitalized, external color separation films must also be re-scanned into digital files for large-scale editions.
2. Comprehensive color management: How to make digital proofing simulate the actual printing effect and match the screen display with printing is very critical, so we must consider the color management of the entire system. For example, the Heidelberg color management system uses a device-independent CIE LAB color space, which covers the entire visible color gamut, and defines a related profile for each device to describe the color characteristics of the device. Apple's operating system and Windows operating system all support Heidelberg's color management program.
3. Imposition: Since there is no longer any manual imposition process, all the information required for printing must be completely lined up by the imposition workstation to form an accurate and complete imposition.
Both PS and PDF files can be impositioned by the imposition workstation. Files of different sizes can also be tiled together, saving film.
Third, digital printing Digital printing includes computer-to-machine direct platemaking technology and computer direct printing technology. The development of plate and plate materials directly affects the development of printing machines. Digital printing can be divided into direct printing and indirect printing. And inkjet printing.
1. Direct printing: The printing plate is directly printed on the paper. Such as Agfa, Xeikon, IBM and other vendors provide products.
Take Xeikon's DCP/32 machine as an example. The principle is: After the RIP processed graphic information control laser, the laser beam emitted by the laser is directed to the organic semiconductor drum to image it, and then the fine toner is adsorbed thereon, forming a toner image on the drum, and the printed toner Heat cured on paper.
2. Indirect printing: Like a conventional offset press, it is transferred by a blanket cylinder. This digital press basically maintains the characteristics of the offset press. Heidelberg DI46, Israel Indigo E-Print1000, KBA 74Karat, and Czech 705CDI Dominant all belong to indirect printing digital presses.
Taking Indigo's E-Print 1000 model as an example, the printing part of this machine is similar to a printing unit of a sheet-fed offset printing press, including a plate cylinder, a blanket cylinder and an impression cylinder. Outside the plate cylinder is a special type of photoconductor material. During printing, the plate is scanned by a computer-controlled laser beam, a latent image is formed on the plate, and electronic ink of a corresponding color is then sprayed on the plate cylinder. At this time, the latent image absorbs ink, forms a monochrome image, and completes printing. The principle of multicolor printing is the same. The improved E-Printl000+ features a photo imaging plate that prints once and scans once. After each printing, the previously formed latent image is erased and it is necessary to rescan to form a new latent image. This plate can be reused.
3. Inkjet printing: The use of computer-controlled nozzles to direct ink jet on the substrate, is a non-printer without roller and the traditional printing is completely different printing. For example, the Sai Angel 624 digital printer, through computer control, ejects fine ink dots from nozzles to form images on substrates. The machine has a maximum of 8 nozzles, each nozzle has a printing width of 10.8 cm, a printing speed of 1500 cm/min, and an inkjet resolution of 240×240 dpi.
Digital presses are currently occupying the market of personalized and low-volume color printing, starting to compete with the market for small offset printing, and the integration of direct platemaking and printing presses is the development direction of future offset press dataization.
Fourth, digital proofing With the introduction of various professional color management software, the popularity of high-precision, large color gamut, low-cost printers, plus the emergence of a variety of printing paper that can simulate coated paper, digital proofing the various bottlenecks All have been broken, it has been accepted and recognized as a mature technology, and has brought convenience and speed to some leading technology platemaking companies. Of course, it is more important to adjust the front and back steps based on the stability of digital proofing to improve the overall color quality of prints.
Representative BESTCOLOR digital proofing, as a member of the world digital proofing family, has won numerous awards around the world for its high quality. BESTCOLOR introduces ICC color management into the production system so that it can be easily proofed with a certain printing standard. These standards are the world-famous European printing standards, the United States printing standards. In order to enable the proofing system to meet the domestic printing conditions, some parameters of the domestic printing environment have been specially formulated to meet the needs of domestic customers. The ICC files created using these standard proofs will represent a certain level of printing, and these standards can be easily digitized.
ICC-based color management uses a device-independent color description language, CIELAB, to establish the color parameters of the environment, so it is important to stabilize the printing process. In recent years, with the development of electronic color separation, spectrodensitometer, electronic engraving, and direct plate making, the process flow has become more and more simple and stable, the conditions for color management have been met, and digital proofing is the first to realize color management. One step will certainly bring greater economic benefits to the company.
V. Digital Printing Networking Due to the advent of the Internet, people can access information anywhere, anytime, and speed and accessibility bring value to printing. It has become the standard to complete more work in a shorter time. From the international perspective, digital printing has become the mainstream and the popularity of e-commerce. Printers have begun to integrate production with strict electronic workflows to provide services to customers.
On-demand printing, online printing, these new concepts of printed e-commerce must be based on the information management within the printing company. Only by doing a good job of informationization within the enterprise can we be in an invincible position in e-commerce in the Internet era.
The network and e-commerce technologies are changing with each passing day. In the face of new technologies, we are in the same starting line with printing companies in developed countries. The construction of a digital management system for printing companies is a difficult and complex system engineering. It is not only to build a computer network, but also to purchase a set of computer software. It is to rely on the technology and new management ideas and concepts of the network and e-commerce. Establish a modern business operation model.
The development of internet and e-commerce technology influences and changes our lives. We face opportunities and challenges. Only by changing our concepts, seizing opportunities, and courageously meeting challenges will we have the guarantee of survival and development. (Liu Yuxia) ("China Packaging News and Print Weekly")
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