With the advent of the era of "Farewell to Lead and Fire," digital application technology has been continuously improved and promoted. Digital platemaking is closely linked with screen printing.
Screen printing prepress plate, has experienced several processes such as manual plate making, photoengraving, laser photocopying and computer direct plate making. The first two are analog plates, the best standard for faithfully reproducing original images. The latter two are digitized plates, which can not only reproduce originals well but also create new images. The application of digital plate making gives screen printing a good condition for improving the printing quality and printing high-precision products.
As digital platemaking, there are generally indirect plate making methods for output film (film) and direct imaging methods on the surface of the plate. A computer-to-plate (CTP) system without a film.
The digital plate-making method of the output film is as its name implies. This is a digital plate-making method in which the computer outputs the film after the original electronic information is interpreted and processed. The film is divided into silver salt-based film and silver salt-free film plate according to the material of the film. Species.
1. The method of outputting silver salt-containing film is the film containing silver salt which is the same as photolithography. The output film also needs to be developed, fixed, washed, dried and other processes in the dark room to obtain a printable version. The film is then attached to the screen and printed on the screen to make a screen printing plate.
The representative method of this method is laser photocopying and plate making, which belongs to the earliest and most widely used digitalized plate making method. With the increase of the resolution of the imagesetter, it has now reached more than 2400dpi, making the quality of the platemaking much better than that of the photoengraving method in terms of image resolution, sharpness, speed, and the like.
However, due to the fact that the silver salt-containing film is also exported, the problem of environmental pollution caused by the presence of silver salts and the use of developing chemicals has been solved.
2. The method of outputting non-silver salt film was developed in the last two years in China. Micro-voltage technology was used to make small ink droplets ejected from the ink head and directly sprayed on the surface of polyester film coated with ink layers to form a "physical imaging method." Digital plate making method. The film used does not contain silver salts and does not require any treatment in the darkroom. It is called "a green environmental protection material in the true sense." The output results are the results obtained, achieve "what you see is what you get", achieve 100% delivery, do not have to worry about "underexposure", "overexposure", "underdevelopment", "over-development" and other platemaking technology problems. Compared with the process of making silver salt film, there are few processes, and the input of the entire system (large-format inkjet printer + RIP) is only equivalent to 1/5 to 1/10 of the output of the same format laser image processing system.
The resolution of this plate-making output device is 7200 dpi x 1440 dpi. A large-format inkjet printer with a droplet size of 6 to 5 PL (equivalent to 1/4 to 1/5 of the diameter of the hair filament). With an image resolution of 133 lines per inch, there is no problem with making screen printed color products.
Basic procedure: RIP Explained The output of a special film representative product is the "Stone CTP-2000 Inkjet System" of the Printing Division of Beijing Sitong Investment Co., Ltd., and "TRD2000 Making Proofing System" of Beijing Tongruidao Co., Ltd. Wait.
Second, the plate-making method directly on the plate image This is a computer screen hanging and raster processing, the layout information dot array, through laser, inkjet, inkjet and other imaging technologies, directly to the dot matrix copy To silver plates, polyester films, screens and other plates. This kind of new technology that directly forms a printable plate by computer processing is called computer-to-plate (CTP).
CTP was first introduced in the beginning of 1990. It was limited to the technical conditions at that time and could only handle black-and-white format files. Compared with computer laser photocopying technology of the same period, CTP has a narrow scope of application. With the development and maturity of computers and laser imaging systems, by 1995, the color CTP technology could directly perform digital imaging on aluminum plates, films, screens, and other materials, further promoting the use of CTP plate-making technology for screen printing.
The use of CTP plate making technology greatly simplifies the entire process flow by simply passing through: graphic typesetting, direct plate making and printing. Compared with the traditional printing process, the photographing output film, a film, a film fixing, a film cleaning, a film drying, and a printing process are omitted. It has the advantages of fast, accurate, stable, repeatable, concise, and easy to control without any film.
Due to the superiority of the CTP platemaking technology, the attention of the screen printing industry has arisen, resulting in a variety of CTP platemaking systems. As a representative product, there is JetScreen Wafer direct platemaking system of Luscher company in Switzerland, which has comprehensively reformed the screen plate making technology and forms a light-blocking wax black ink image layer serving as a mask directly on the photosensitive resin by means of inkjet printing. After full-page exposure, the wax black ink image and the unsensitized photosensitive layer are removed by hot water washing to produce a high-quality image with a web size of 3m×7m, a resolution of 75 lines/inch, and a repeatability of 0.02mm. . Due to the elimination of many tedious processes in traditional platemaking production, saving production time, accelerating production schedules, reducing plate making costs, and producing large-format images, it is favored by the advertising industry. This is a direct plate making technology for screen printing. It uses laser scanning to expose the screen stencil coated with special photoresist, and then rinses and develops the plate.
Third, digital proofing Digital proofing refers to the digital manuscript after processing electronic manuscripts, directly output monochrome color proofs prepress digital proofing technology. The proofing method is to use color management software and spectrophotometer to establish the ICC profile of the printing environment and digital proofing environment, and then use a well-developed feature file to digitally proof the output and verify the consistency of digital proofing and printing results.
Compared with traditional proofing, the strict requirements for the proofing environment temperature, humidity, and paper moisture are avoided, and the dependence on operating experience is not required for film proofing. In addition, the results of each repeated proofing are stable and consistent, and the error is eliminated before the printing plate is formed. The input is lower than the traditional analog proofing, but the quality is consistent with the traditional proofing and the printing effect is achieved. This advanced technology proofing is gradually impacting the traditional method of proofing. In particular, the recent launch of BLACK MAGIC's true dot digital proofing technology similar to AM sites will help solve the problem of coordination between the colors formed by FM networks and conventional printing AM sites, and further promote the promotion and application of digital proofing technology.
This kind of high-quality, fast, low-cost digital proofing that is conducive to improving production efficiency will certainly help screen printing to accelerate the pace of advancement.
Fourth, the impact of digital platemaking technology on screen printing The emergence and development of digital plate making technology, the network printing plate making a fundamental change, completely out of the traditional, backward, low quality, slow analog printing methods, and other printing In the same way, entering a new era of digitalization will no longer be limited to the printing of only 30 lines, low-quality, thick lines of general products, and will be able to print large-format, high-precision, thin cable, fine, high-quality prints. In particular, the adoption of dot-smooth dot printing with the uniform dot size and color depth reflected by dot density has fundamentally solved the problem of “rhized lines†which have been plagued with the development of screen printing and further promoted screen printing. Take off.
Digital plate making is not only the reform of plain printing, embossing, and gravure plate making, but also a major revolution in screen printing plate making technology. It is the key to improving the quality of screen printing and will inevitably make screen printing play an important role in the advertising industry again. .
Screen printing prepress plate, has experienced several processes such as manual plate making, photoengraving, laser photocopying and computer direct plate making. The first two are analog plates, the best standard for faithfully reproducing original images. The latter two are digitized plates, which can not only reproduce originals well but also create new images. The application of digital plate making gives screen printing a good condition for improving the printing quality and printing high-precision products.
As digital platemaking, there are generally indirect plate making methods for output film (film) and direct imaging methods on the surface of the plate. A computer-to-plate (CTP) system without a film.
The digital plate-making method of the output film is as its name implies. This is a digital plate-making method in which the computer outputs the film after the original electronic information is interpreted and processed. The film is divided into silver salt-based film and silver salt-free film plate according to the material of the film. Species.
1. The method of outputting silver salt-containing film is the film containing silver salt which is the same as photolithography. The output film also needs to be developed, fixed, washed, dried and other processes in the dark room to obtain a printable version. The film is then attached to the screen and printed on the screen to make a screen printing plate.
The representative method of this method is laser photocopying and plate making, which belongs to the earliest and most widely used digitalized plate making method. With the increase of the resolution of the imagesetter, it has now reached more than 2400dpi, making the quality of the platemaking much better than that of the photoengraving method in terms of image resolution, sharpness, speed, and the like.
However, due to the fact that the silver salt-containing film is also exported, the problem of environmental pollution caused by the presence of silver salts and the use of developing chemicals has been solved.
2. The method of outputting non-silver salt film was developed in the last two years in China. Micro-voltage technology was used to make small ink droplets ejected from the ink head and directly sprayed on the surface of polyester film coated with ink layers to form a "physical imaging method." Digital plate making method. The film used does not contain silver salts and does not require any treatment in the darkroom. It is called "a green environmental protection material in the true sense." The output results are the results obtained, achieve "what you see is what you get", achieve 100% delivery, do not have to worry about "underexposure", "overexposure", "underdevelopment", "over-development" and other platemaking technology problems. Compared with the process of making silver salt film, there are few processes, and the input of the entire system (large-format inkjet printer + RIP) is only equivalent to 1/5 to 1/10 of the output of the same format laser image processing system.
The resolution of this plate-making output device is 7200 dpi x 1440 dpi. A large-format inkjet printer with a droplet size of 6 to 5 PL (equivalent to 1/4 to 1/5 of the diameter of the hair filament). With an image resolution of 133 lines per inch, there is no problem with making screen printed color products.
Basic procedure: RIP Explained The output of a special film representative product is the "Stone CTP-2000 Inkjet System" of the Printing Division of Beijing Sitong Investment Co., Ltd., and "TRD2000 Making Proofing System" of Beijing Tongruidao Co., Ltd. Wait.
Second, the plate-making method directly on the plate image This is a computer screen hanging and raster processing, the layout information dot array, through laser, inkjet, inkjet and other imaging technologies, directly to the dot matrix copy To silver plates, polyester films, screens and other plates. This kind of new technology that directly forms a printable plate by computer processing is called computer-to-plate (CTP).
CTP was first introduced in the beginning of 1990. It was limited to the technical conditions at that time and could only handle black-and-white format files. Compared with computer laser photocopying technology of the same period, CTP has a narrow scope of application. With the development and maturity of computers and laser imaging systems, by 1995, the color CTP technology could directly perform digital imaging on aluminum plates, films, screens, and other materials, further promoting the use of CTP plate-making technology for screen printing.
The use of CTP plate making technology greatly simplifies the entire process flow by simply passing through: graphic typesetting, direct plate making and printing. Compared with the traditional printing process, the photographing output film, a film, a film fixing, a film cleaning, a film drying, and a printing process are omitted. It has the advantages of fast, accurate, stable, repeatable, concise, and easy to control without any film.
Due to the superiority of the CTP platemaking technology, the attention of the screen printing industry has arisen, resulting in a variety of CTP platemaking systems. As a representative product, there is JetScreen Wafer direct platemaking system of Luscher company in Switzerland, which has comprehensively reformed the screen plate making technology and forms a light-blocking wax black ink image layer serving as a mask directly on the photosensitive resin by means of inkjet printing. After full-page exposure, the wax black ink image and the unsensitized photosensitive layer are removed by hot water washing to produce a high-quality image with a web size of 3m×7m, a resolution of 75 lines/inch, and a repeatability of 0.02mm. . Due to the elimination of many tedious processes in traditional platemaking production, saving production time, accelerating production schedules, reducing plate making costs, and producing large-format images, it is favored by the advertising industry. This is a direct plate making technology for screen printing. It uses laser scanning to expose the screen stencil coated with special photoresist, and then rinses and develops the plate.
Third, digital proofing Digital proofing refers to the digital manuscript after processing electronic manuscripts, directly output monochrome color proofs prepress digital proofing technology. The proofing method is to use color management software and spectrophotometer to establish the ICC profile of the printing environment and digital proofing environment, and then use a well-developed feature file to digitally proof the output and verify the consistency of digital proofing and printing results.
Compared with traditional proofing, the strict requirements for the proofing environment temperature, humidity, and paper moisture are avoided, and the dependence on operating experience is not required for film proofing. In addition, the results of each repeated proofing are stable and consistent, and the error is eliminated before the printing plate is formed. The input is lower than the traditional analog proofing, but the quality is consistent with the traditional proofing and the printing effect is achieved. This advanced technology proofing is gradually impacting the traditional method of proofing. In particular, the recent launch of BLACK MAGIC's true dot digital proofing technology similar to AM sites will help solve the problem of coordination between the colors formed by FM networks and conventional printing AM sites, and further promote the promotion and application of digital proofing technology.
This kind of high-quality, fast, low-cost digital proofing that is conducive to improving production efficiency will certainly help screen printing to accelerate the pace of advancement.
Fourth, the impact of digital platemaking technology on screen printing The emergence and development of digital plate making technology, the network printing plate making a fundamental change, completely out of the traditional, backward, low quality, slow analog printing methods, and other printing In the same way, entering a new era of digitalization will no longer be limited to the printing of only 30 lines, low-quality, thick lines of general products, and will be able to print large-format, high-precision, thin cable, fine, high-quality prints. In particular, the adoption of dot-smooth dot printing with the uniform dot size and color depth reflected by dot density has fundamentally solved the problem of “rhized lines†which have been plagued with the development of screen printing and further promoted screen printing. Take off.
Digital plate making is not only the reform of plain printing, embossing, and gravure plate making, but also a major revolution in screen printing plate making technology. It is the key to improving the quality of screen printing and will inevitably make screen printing play an important role in the advertising industry again. .
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