Screen printing is one of the major printing processes in the field of packaging and printing. Currently, the combination of digital technology and screen printing has become a viable practical exploration through the application of direct screen-printing technology, thus expanding the development of screen printing. step.
First, direct digital imaging and screen printing plate
In the late 1990s, as digital technology continued to mature, a major technological revolution took place in screen printing plate making technology. Computer to-plate (CTP) technology, also known as digital direct plate making, was about to be ink jet technology. Migrate to screenprint CTP plate.
Direct digital imaging uses a combination of existing precision computers and laser technology to control an optical system and scan the screen plate with a modulated laser beam. Screen printing plates use chemical paints instead of sensitized adhesives, do not need to spray hot waxes, and use computers to scan the original image on the stencils of already-sprayed chemical paints, and then use water to wash off the chemical paints to form images. This direct imaging method is the direction of future development. There is also a method of direct imaging plate making, which uses a computer-scanning laser imaging directly on a special metallic gold film. This will save the screen and photoresist. The stencils produced by this plate making method are not deformed, are accurate, and have high printing precision, and are also the future development direction.
The direct digital imaging plate making method, which has been put into commercial use, uses less energy to enable exposure and hardening of the screen plated photosensitive layer. Its appearance and application have brought about fundamental changes to the traditional screen-printing process, marking that the screen-printing technology has begun to enter a new phase of digitization.
Compared with projection platemaking, direct digital imaging platemaking has many advantages. It is technically more advanced. A printing plate can be made in one step, completely eliminating the use of silver salt film, thus eliminating the environment brought by washing chemicals. Pollution. Computer-aided design data can be directly transmitted to the template without an intermediate photographing step; the digitized image scanner can directly input the original image, driving the laser imaging of the screen plate, and the image clarity is also very high.
Traditional color screen printing color film production, can not do without film, especially in the face of large-scale screen printing, is nothing more than the use of film imposition, enlarge the film or exposure screen version. In either case, it is necessary to create a high-precision, high-line count film. Splicing film is not only expensive, but it is difficult to ensure that the stitching marks are not exposed. The enlargement of the film and the exposure of the screen are limited by the objective factors such as the image distance and the lens surface, which brings many difficulties to actual production.
Digital screening printing technology includes the latest random screening, FM screening technology. Imaging is much faster than using a traditional screen. When selecting the imaging speed, the operator can adjust the image fineness, color value, viewing distance, and print size. Obviously, the lower the number of screen lines, the faster the nozzle moves on the template.
The plate making process of the computer-to-plate system not only allows the image to be uniformly sprayed, but also has rich subtle layers, clear edges, and a long service life of the template. At the same time, all printing inks, especially water-based UV inks, can be used. It is worth mentioning that the computer-to-plate system has a more realistic and natural effect on the reproduction of skin tones.
Second, digital proofing technology
Making screen printing images more realistic The greatest possibility of combining screen printing with digital printing to achieve success lies in the use of digital printing presses for screen printing. Traditionally, we use screen printers for proofing, which is costly. Other options include digital proofing and Chromalin proofing, which uses DuPont's mixed dye toner to match the color of Pantone chromatography, placing the toner in solution, and then applying it to the substrate. This technique cannot truly show the net effect of screen printing.
However, the elaborate digital proofing technology gives us an opportunity to more realistically simulate screen printing images. The RIP outputs the dot shape of the actual application at a certain angle, thereby reproducing the density and hue that the screen printing ink can achieve. This method can also adapt the calibration curve to screen printers or composite materials with different performances, making the proofing closer to the image effect.
As screen printers use digital technology more efficiently, the cost is reduced, and profits are increased. Printers are convinced that screen printing technology still has its potential and poses greater challenges to digital printing.
Third, digital printing and screen printing advertising
The characteristics of screen printing determine its dominant position in the advertising printing market. The main characteristics of screen printing, such as the adaptability of the substrate, the latitude of the ink, the thickness of the ink, etc. are all conducive to the printing of advertisements.
Although digital printing technology entered the market only for a few years, it has been developing rapidly. Can be divided into: color inkjet printers, large computer inkjet printers, electrostatic printers (also known as computer photo system). They are all the output of the computer manuscript design workstation directly into print.
1. Color Inkjet Printing: Color inkjet printers are characterized by relatively low price and high precision, but most of them use water-soluble inks. Because inks and consumables have poor weatherability, they are suitable for indoor use. Compared with other printing technologies, this kind of printer is slower and it has certain difficulties in mass production.
2. Computer Inkjet: Mostly used spray gun structure, with four-color spray gun to spray ink directly on the substrate. Large-format computer inkjet printers have been widely used by advertising production companies, and many outdoor advertisements are inkjet printers. The recently introduced flatbed inkjet printer can print on various materials such as metal plates, plastic plates, glass plates, and wooden boards. However, the clarity of this type of machine is low, and the resulting picture is suitable for long-distance viewing and poor viewing at close quarters.
3. Computer photo: It is an electrostatic output device that uses toner to electrostatically attract toner onto the substrate. This technology also has a certain market in the advertising printing industry. The main features of the electrostatic printing press are its high precision, up to 400 dpi, high speed, color saturation and layering, and it can be used indoors and outdoors.
Screen printing advertisements are different from television, radio and periodical advertisements in terms of their various forms and types, such as outdoor poster advertisements, light box advertisements, body advertisements, banner advertisements, inflatable advertisements, banner advertisements, etc. These advertisements have their common features. .
Screen printing advertisements are often large-format, generally full sheet size, and the largest screen in practical use is 3.8 m × 8 m. Screen printing advertisements are mostly used for outdoor posting and are placed in the eye-catching space of people's activities. Cater to the visual effects of the flow; the materials used for screen printing are relatively heavy, and some even become three-dimensional. Many advertisements are printed on stickers, light boxes, plastic sheets, glass or other plates, and some are made into three-dimensional advertisements.
From the types and characteristics of screen printing ads mentioned above, it can be seen that other advertising media can hardly replace its position. In today's fierce development of online media, screen-printing advertisements that are active in the direct space environment of people's daily lives have a strong vitality.
Obviously, for the advertising printing market, digital printing and screen printing are competitors. Digital printing and screen printing will coexist in advertising production. The former applies to small batches of live jobs, while the latter applies to large quantities of live jobs; digital technology will transform the traditional process of screen printing to make it more viable. It is said that in 1997-1999, the number of machines sold in both European printing methods increased, and both digital printing and screen printing increased.
Fourth, digital technology to strengthen the advantages of screen printing
At present, the color screen printing market is faced with the impact of four-color digital printing. Spot color printing is not an obstacle for commercial products from screen printing to digital printing. Many major screen printing companies have made significant investments in new machines and new technologies, including multi-color printers and UV-cured screen printing inks, and digital printing for proofing and short live printing.
The introduction of digital flatbed UV inkjet printing pioneered the short-run production of prints on a wide range of thick, strong and irregular substrates that were previously reserved for screen printing. In recent years, more screen printing ink companies began to use thicker substrates for printing. Although the printing speed has not yet reached expectations, today's ink jet printers are much faster than the original models, and they are generally capable of wide-format printing production with about 200 print jobs and can be printed on any material.
Digitized screen printing is easy to operate, has a layout in the computer, easy to modify, there is more space for creative design and play, there is no process such as developing and fixing, there is no need for darkroom operation, no use of chemicals, and no pollution to the environment.
In addition to the use of digital printing technology, many screen printing companies supplemented their graphic work with their graphic work, making full use of the advantages of screen printing and focusing on other applications such as the printing of conductive thick films for RFID. .
The development of digital technologies not only opens the door to new opportunities, but also promotes new improvements in screen printing and prepress technology. For example, computer-directed plate printing technology improves image quality and consistency, and eliminates the overall process. Several steps reduce the time for screen printing. Inkjet eliminates many of the hassles from screen printing, making it faster, more repeatable, and more cost-effective.
V. Development Trends of Digital Technology and Screen Printing
Digitalization has become a recognized development trend in the printing industry. The printing industry is also vigorously promoting the digital work process. The screen printing industry should use digital technology to organically combine traditional screen printing technology with digital technology, and use traditional screen printing technology to drive new technological means to be fully transformed to gain new vitality and broad space for development.
The current situation of China's screen printing industry shows that the key to the current development of screen printing technology is to grasp the digitization of individual equipment technologies and technologies before printing, printing, and printing, and further grasp the digital, network, and integration of screen printing process. With the continuous deepening of new technologies, screen printing equipment systems are undergoing tremendous changes. From the original single screen printing equipment to the online supporting equipment, the separation system gradually moves from integration to integration. At the same time, each single computer and system is also facing professionalism. And meticulous direction development. In the past, prepress, printing, and postpress had strict boundaries. Screen printing machinery manufacturers needed to complete only a single screen printer. With the development of digitization and networking, screen printing prepress, printing and postpress processing equipment will be organically combined to form an equipment system that can comprehensively complete the screen printing process.
In short, digital printing and screen printing have both a competitive side and a complementary side. Screen printers should seize the opportunity to use digitalization.
First, direct digital imaging and screen printing plate
In the late 1990s, as digital technology continued to mature, a major technological revolution took place in screen printing plate making technology. Computer to-plate (CTP) technology, also known as digital direct plate making, was about to be ink jet technology. Migrate to screenprint CTP plate.
Direct digital imaging uses a combination of existing precision computers and laser technology to control an optical system and scan the screen plate with a modulated laser beam. Screen printing plates use chemical paints instead of sensitized adhesives, do not need to spray hot waxes, and use computers to scan the original image on the stencils of already-sprayed chemical paints, and then use water to wash off the chemical paints to form images. This direct imaging method is the direction of future development. There is also a method of direct imaging plate making, which uses a computer-scanning laser imaging directly on a special metallic gold film. This will save the screen and photoresist. The stencils produced by this plate making method are not deformed, are accurate, and have high printing precision, and are also the future development direction.
The direct digital imaging plate making method, which has been put into commercial use, uses less energy to enable exposure and hardening of the screen plated photosensitive layer. Its appearance and application have brought about fundamental changes to the traditional screen-printing process, marking that the screen-printing technology has begun to enter a new phase of digitization.
Compared with projection platemaking, direct digital imaging platemaking has many advantages. It is technically more advanced. A printing plate can be made in one step, completely eliminating the use of silver salt film, thus eliminating the environment brought by washing chemicals. Pollution. Computer-aided design data can be directly transmitted to the template without an intermediate photographing step; the digitized image scanner can directly input the original image, driving the laser imaging of the screen plate, and the image clarity is also very high.
Traditional color screen printing color film production, can not do without film, especially in the face of large-scale screen printing, is nothing more than the use of film imposition, enlarge the film or exposure screen version. In either case, it is necessary to create a high-precision, high-line count film. Splicing film is not only expensive, but it is difficult to ensure that the stitching marks are not exposed. The enlargement of the film and the exposure of the screen are limited by the objective factors such as the image distance and the lens surface, which brings many difficulties to actual production.
Digital screening printing technology includes the latest random screening, FM screening technology. Imaging is much faster than using a traditional screen. When selecting the imaging speed, the operator can adjust the image fineness, color value, viewing distance, and print size. Obviously, the lower the number of screen lines, the faster the nozzle moves on the template.
The plate making process of the computer-to-plate system not only allows the image to be uniformly sprayed, but also has rich subtle layers, clear edges, and a long service life of the template. At the same time, all printing inks, especially water-based UV inks, can be used. It is worth mentioning that the computer-to-plate system has a more realistic and natural effect on the reproduction of skin tones.
Second, digital proofing technology
Making screen printing images more realistic The greatest possibility of combining screen printing with digital printing to achieve success lies in the use of digital printing presses for screen printing. Traditionally, we use screen printers for proofing, which is costly. Other options include digital proofing and Chromalin proofing, which uses DuPont's mixed dye toner to match the color of Pantone chromatography, placing the toner in solution, and then applying it to the substrate. This technique cannot truly show the net effect of screen printing.
However, the elaborate digital proofing technology gives us an opportunity to more realistically simulate screen printing images. The RIP outputs the dot shape of the actual application at a certain angle, thereby reproducing the density and hue that the screen printing ink can achieve. This method can also adapt the calibration curve to screen printers or composite materials with different performances, making the proofing closer to the image effect.
As screen printers use digital technology more efficiently, the cost is reduced, and profits are increased. Printers are convinced that screen printing technology still has its potential and poses greater challenges to digital printing.
Third, digital printing and screen printing advertising
The characteristics of screen printing determine its dominant position in the advertising printing market. The main characteristics of screen printing, such as the adaptability of the substrate, the latitude of the ink, the thickness of the ink, etc. are all conducive to the printing of advertisements.
Although digital printing technology entered the market only for a few years, it has been developing rapidly. Can be divided into: color inkjet printers, large computer inkjet printers, electrostatic printers (also known as computer photo system). They are all the output of the computer manuscript design workstation directly into print.
1. Color Inkjet Printing: Color inkjet printers are characterized by relatively low price and high precision, but most of them use water-soluble inks. Because inks and consumables have poor weatherability, they are suitable for indoor use. Compared with other printing technologies, this kind of printer is slower and it has certain difficulties in mass production.
2. Computer Inkjet: Mostly used spray gun structure, with four-color spray gun to spray ink directly on the substrate. Large-format computer inkjet printers have been widely used by advertising production companies, and many outdoor advertisements are inkjet printers. The recently introduced flatbed inkjet printer can print on various materials such as metal plates, plastic plates, glass plates, and wooden boards. However, the clarity of this type of machine is low, and the resulting picture is suitable for long-distance viewing and poor viewing at close quarters.
3. Computer photo: It is an electrostatic output device that uses toner to electrostatically attract toner onto the substrate. This technology also has a certain market in the advertising printing industry. The main features of the electrostatic printing press are its high precision, up to 400 dpi, high speed, color saturation and layering, and it can be used indoors and outdoors.
Screen printing advertisements are different from television, radio and periodical advertisements in terms of their various forms and types, such as outdoor poster advertisements, light box advertisements, body advertisements, banner advertisements, inflatable advertisements, banner advertisements, etc. These advertisements have their common features. .
Screen printing advertisements are often large-format, generally full sheet size, and the largest screen in practical use is 3.8 m × 8 m. Screen printing advertisements are mostly used for outdoor posting and are placed in the eye-catching space of people's activities. Cater to the visual effects of the flow; the materials used for screen printing are relatively heavy, and some even become three-dimensional. Many advertisements are printed on stickers, light boxes, plastic sheets, glass or other plates, and some are made into three-dimensional advertisements.
From the types and characteristics of screen printing ads mentioned above, it can be seen that other advertising media can hardly replace its position. In today's fierce development of online media, screen-printing advertisements that are active in the direct space environment of people's daily lives have a strong vitality.
Obviously, for the advertising printing market, digital printing and screen printing are competitors. Digital printing and screen printing will coexist in advertising production. The former applies to small batches of live jobs, while the latter applies to large quantities of live jobs; digital technology will transform the traditional process of screen printing to make it more viable. It is said that in 1997-1999, the number of machines sold in both European printing methods increased, and both digital printing and screen printing increased.
Fourth, digital technology to strengthen the advantages of screen printing
At present, the color screen printing market is faced with the impact of four-color digital printing. Spot color printing is not an obstacle for commercial products from screen printing to digital printing. Many major screen printing companies have made significant investments in new machines and new technologies, including multi-color printers and UV-cured screen printing inks, and digital printing for proofing and short live printing.
The introduction of digital flatbed UV inkjet printing pioneered the short-run production of prints on a wide range of thick, strong and irregular substrates that were previously reserved for screen printing. In recent years, more screen printing ink companies began to use thicker substrates for printing. Although the printing speed has not yet reached expectations, today's ink jet printers are much faster than the original models, and they are generally capable of wide-format printing production with about 200 print jobs and can be printed on any material.
Digitized screen printing is easy to operate, has a layout in the computer, easy to modify, there is more space for creative design and play, there is no process such as developing and fixing, there is no need for darkroom operation, no use of chemicals, and no pollution to the environment.
In addition to the use of digital printing technology, many screen printing companies supplemented their graphic work with their graphic work, making full use of the advantages of screen printing and focusing on other applications such as the printing of conductive thick films for RFID. .
The development of digital technologies not only opens the door to new opportunities, but also promotes new improvements in screen printing and prepress technology. For example, computer-directed plate printing technology improves image quality and consistency, and eliminates the overall process. Several steps reduce the time for screen printing. Inkjet eliminates many of the hassles from screen printing, making it faster, more repeatable, and more cost-effective.
V. Development Trends of Digital Technology and Screen Printing
Digitalization has become a recognized development trend in the printing industry. The printing industry is also vigorously promoting the digital work process. The screen printing industry should use digital technology to organically combine traditional screen printing technology with digital technology, and use traditional screen printing technology to drive new technological means to be fully transformed to gain new vitality and broad space for development.
The current situation of China's screen printing industry shows that the key to the current development of screen printing technology is to grasp the digitization of individual equipment technologies and technologies before printing, printing, and printing, and further grasp the digital, network, and integration of screen printing process. With the continuous deepening of new technologies, screen printing equipment systems are undergoing tremendous changes. From the original single screen printing equipment to the online supporting equipment, the separation system gradually moves from integration to integration. At the same time, each single computer and system is also facing professionalism. And meticulous direction development. In the past, prepress, printing, and postpress had strict boundaries. Screen printing machinery manufacturers needed to complete only a single screen printer. With the development of digitization and networking, screen printing prepress, printing and postpress processing equipment will be organically combined to form an equipment system that can comprehensively complete the screen printing process.
In short, digital printing and screen printing have both a competitive side and a complementary side. Screen printers should seize the opportunity to use digitalization.
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