The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. High-precision offset printing technology is the author's proposition in 2005, its technical structure is: high-precision screening color separation technology, high-density printing and copying technology, high saturation printing and copying technology, long-graded hierarchical replication technology, color management and control Technology, high precision offset printing technology standards. High-precision offset printing technology is the inheritance and development of traditional offset printing technology, and it is a practical digital technology for standardized and digitalized high-quality offset printing production. The use of this technology to produce prints has the advantages and characteristics of high-definition, bright colors, strong three-dimensional effect, and good light perception. High-precision offset printing technology makes color and level quality control no longer a technically very strong matter.
Printing is an ancient technique and it is one of the four great inventions in ancient China. The invention of offset printing technology was a matter of the 20th century. Although the history is short, the development is very fast and there are many academic schools.
Modern offset printing technology is a comprehensive application technology that integrates light, machine, electricity, chemistry, computer, color science and aesthetics. It belongs to the high-tech field, and its technology is complex and its technical requirements are high. The completion of a color offset print usually requires scanning, color separation, computer production, plate making, printing, and postpress processing. Separation models, color separation equipment, plate-making output devices, printing presses, inks, paper, etc. all affect print quality. From manuscripts to color separations, color separations to printing plates, printing plates to printing presses, and final completion of the printing press, errors may occur at every stage. Each printing company has mastered a great deal of experience through many years of practice. Each skilled printing operator has his own set of methods for solving problems based on his years of experience. However, high-precision printing technology is more difficult to grasp. It is an indisputable fact that high quality is difficult to control.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. Today, color scientists all over the world continue to provide many valuable methods for the perception, measurement, and reproduction of color, enabling people to think new ways about printing technology and quality, seek new methods, and continue to take a new height. With the advancement of computer high-speed computing storage and software massive retrieval capabilities, we have been able to support us to further understand the characteristics of color, grasp the key technologies of copying color and reproduction tone, and make up for the lack of original printing theory and technology.
Combining the prepress separation and printing synthesis as a complete system for research and harmonization, effectively controlling and avoiding problems in all aspects of the offset printing technology, minimizing errors, making the print faithful to the original or higher than the original, is the offset printing The highest requirements put forward by technology are also the basic tasks of high-precision offset printing technology.
High-precision offset printing technology is the proposition that the author put forward in 2005 on the basis of absorbing the crystallization of previous thinking and summarizing the "high-grade plate printing technology research and development" technology. This proposition is implemented in research projects such as the research and development of high-quality plate printing technology for ordinary PS plates, the database of high-precision offset printing technology, the demonstration of high-precision offset printing technology, and the research and development of multi-color high-precision color image printing and copying technology. During the process, we constantly made breakthroughs and gradually improved.
High-precision offset printing technology adopts the principle of traditional color separation to study the classification methods and characteristics of images, create more scientific subdivision methods, create high-precision color separation models, and solve important and difficult problems of color separation and color correction. It is a traditional offset printing technology. The inheritance and promotion. High-precision offset printing technology, which combines prepress separation and printing synthesis as a complete system for research and coordination, effectively controls and avoids problems in all aspects of offset printing technology, minimizes errors, and is the innovation and development of traditional offset printing technology. High-precision offset printing technology application of standardized production, data methods and means, create model development software to eliminate the error caused by the use of different equipment, and the error correction operation is very convenient and effective, is the offset printing technology control theory innovation and development. The printed matter produced by using high-precision offset printing technology has advantages and characteristics such as high definition, bright color, strong three-dimensionality, and good light perception. Its technical specifications are in line with the current international and national standards systems, and its index value exceeds the standard expectation, breaking the traditional offset printing technology. The bottleneck of quality, high-precision offset printing technology partially compensated for the lack of original printing theory and technology.
High-precision offset printing technology is a high-tech printing process design and control technology. Its technical structure is: high-precision screening color separation printing technology, high-density printing and copying technology, high-saturation printing and copying technology, long-graded level reproduction technology, color management control technology, high-precision offset printing technology standards.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. High-precision offset printing technology is the author's proposition in 2005, its technical structure is: high-precision screening color separation technology, high-density printing and copying technology, high saturation printing and copying technology, long-graded hierarchical replication technology, color management and control Technology, high precision offset printing technology standards. High-precision offset printing technology is the inheritance and development of traditional offset printing technology, and it is a practical digital technology for standardized and digitalized high-quality offset printing production. The use of this technology to produce prints has the advantages and characteristics of high-definition, bright colors, strong three-dimensional effect, and good light perception. High-precision offset printing technology makes color and level quality control no longer a technically very strong matter.
Printing is an ancient technique and it is one of the four great inventions in ancient China. The invention of offset printing technology was a matter of the 20th century. Although the history is short, the development is very fast and there are many academic schools.
Modern offset printing technology is a comprehensive application technology that integrates light, machine, electricity, chemistry, computer, color science and aesthetics. It belongs to the high-tech field, and its technology is complex and its technical requirements are high. The completion of a color offset print usually requires scanning, color separation, computer production, plate making, printing, and postpress processing. Separation models, color separation equipment, plate-making output devices, printing presses, inks, paper, etc. all affect print quality. From manuscripts to color separations, color separations to printing plates, printing plates to printing presses, and final completion of the printing press, errors may occur at every stage. Each printing company has mastered a great deal of experience through many years of practice. Each skilled printing operator has his own set of methods for solving problems based on his years of experience. However, high-precision printing technology is more difficult to grasp. It is an indisputable fact that high quality is difficult to control.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. Today, color scientists all over the world continue to provide many valuable methods for the perception, measurement, and reproduction of color, enabling people to think new ways about printing technology and quality, seek new methods, and continue to take a new height. With the advancement of computer high-speed computing storage and software massive retrieval capabilities, we have been able to support us to further understand the characteristics of color, grasp the key technologies of copying color and reproduction tone, and make up for the lack of original printing theory and technology.
Combining the prepress separation and printing synthesis as a complete system for research and harmonization, effectively controlling and avoiding problems in all aspects of the offset printing technology, minimizing errors, making the print faithful to the original or higher than the original, is the offset printing The highest requirements put forward by technology are also the basic tasks of high-precision offset printing technology.
High-precision offset printing technology is the proposition that the author put forward in 2005 on the basis of absorbing the crystallization of previous thinking and summarizing the "high-grade plate printing technology research and development" technology. This proposition is implemented in research projects such as the research and development of high-quality plate printing technology for ordinary PS plates, the database of high-precision offset printing technology, the demonstration of high-precision offset printing technology, and the research and development of multi-color high-precision color image printing and copying technology. During the process, we constantly made breakthroughs and gradually improved.
High-precision offset printing technology adopts the principle of traditional color separation to study the classification methods and characteristics of images, create more scientific subdivision methods, create high-precision color separation models, and solve important and difficult problems of color separation and color correction. It is a traditional offset printing technology. The inheritance and promotion. High-precision offset printing technology, which combines prepress separation and printing synthesis as a complete system for research and coordination, effectively controls and avoids problems in all aspects of offset printing technology, minimizes errors, and is the innovation and development of traditional offset printing technology. High-precision offset printing technology application of standardized production, data methods and means, create model development software to eliminate the error caused by the use of different equipment, and the error correction operation is very convenient and effective, is the offset printing technology control theory innovation and development.
The printed matter produced by using high-precision offset printing technology has advantages and characteristics such as high definition, bright color, strong three-dimensionality, and good light perception. Its technical specifications are in line with the current international and national standards systems, and its index value exceeds the standard expectation, breaking the traditional offset printing technology. The bottleneck of quality, high-precision offset printing technology partially compensated for the lack of original printing theory and technology.
High-precision offset printing technology is a high-tech printing process design and control technology. Its technical structure is: high-precision screening color separation printing technology, high-density printing and copying technology, high-saturation printing and copying technology, long-graded level reproduction technology, color management control technology, high-precision offset printing technology standards.
2) High-density printing and copying technology
Density, also known as optical density, is the characteristic measure of light absorbed by an object, ie, the ratio of the amount of incident light to the amount of reflected light or transmitted light. It can be divided into reflection density and transmission density, and expressed in terms of the decimal logarithm of the reflectivity or transmittance of the inverse. The brightness of the image can be expressed as a density. Bright tone refers to the bright tone on the screen; dark tone refers to the dark tone on the screen; midtone refers to the tone between the bright tone and the dark tone on the screen.
High-density printing and copying technology means that the highest density of four-color prints is Dmax=2.0~2.4, which is much higher than the highest density of traditional four-color prints, Dmax=1.8. This indicator has a large difference between bright and dark tone, many layers, and excellent level curves, and has a strong three-dimensional image and good texture. The reason is: On the one hand, the hierarchy refers to the density level from the brightest to the darkest tone on the image. Levels are usually measured with a ruler. How much the level determines the color change and texture on the screen. On the other hand, the relationship between the original density and the replica density is called a hierarchical curve.
This high-density index is unimaginable for traditional four-color printing technologists, because when Dmax>1.8, the traditional four-color printing control method is easy to cause quality accidents such as paste printing and large color deviation. The high-precision offset printing technology can use the UCR process to find the dot deformation rules, correct the color separation and mathematical model of printing synthesis, make up for deviations, and easily achieve high-density print reproduction. Of course, it is also important to use domestic inks with good coloring power and good printing performance, and it is necessary to perform Lab value test and printability test on the ink.
3) High saturation print replication technology
Saturation refers to the purity of the color, indicating the degree to which the object reflects or transmits color light. The monochromatic light in the visible spectrum has the highest saturation.
The law of color substitution states that any color C can be matched by a mixture of a certain amount of monochromatic light Cλ with a wavelength λ and a certain amount of white light W: C=Cλ+W. Therefore, the saturation of one color can be understood as the proportion of the monochromatic light Cλ that matches this color to the total light. S represents saturation, then S=Cλ/C=Cλ/(Cλ+W). Therefore, only the difference in brightness is achromatic.
High-saturation printing and copying technology requires UCA ground color gain process using non-color structure GCR technology, and also needs to use CIELAB color difference formula to correct color separation and printing synthesis mathematical model.
4) Long-order tone level replication technology
The long-graded hierarchical copying technology is based on the high-density printing and copying technology of the printing and copying technology, and it depends on the improvement of the highest density Dmax of the printed matter, and more on the improvement of the level curve. The Offset Process Technology Database 2006 software developed with high-precision offset printing technology eliminates dot-pass errors and improves the characteristics of hierarchical curves. The use of long-graded hierarchical replication technology network dot area ratio of 2% to 97% of the outlets, can be completely reproduced in the print; 50% of the dot gain value is less than 16%.
5) Color Management Control Technology
Select a typical color management module CMM to measure the colorimetric CIELAB color parameters.
Plot the chromaticity point C in the a/b two-dimensional coordinate system. The luminance point L is drawn in the color/color brightness two-dimensional coordinate system. Compare the color scale characteristics of the high-precision offset color separation model and the conventional four-color color separation model. The color separation algorithm will affect the color scale characteristics of printed colors. The color gamut linearity of the color input mode is compared with the color separation printing. The higher the linear similarity, the better the color separation algorithm.
Due to the selection of a typical color management module CMM for testing and application of excellent dot-error elimination techniques, the use of high-precision offset printing technology, the print color deviation ΔE is less than 2.5.
6) High-precision offset printing technology standard
High-precision offset printing technology is independently developed by the Institute of Printing Technology of Yunnan Province. Its technical specifications are in line with the current national standards GB/T17932.2-1999 and the international standard ISO12647-21996 index system, exceeding its expected value.
Printing is an ancient technique and it is one of the four great inventions in ancient China. The invention of offset printing technology was a matter of the 20th century. Although the history is short, the development is very fast and there are many academic schools.
Modern offset printing technology is a comprehensive application technology that integrates light, machine, electricity, chemistry, computer, color science and aesthetics. It belongs to the high-tech field, and its technology is complex and its technical requirements are high. The completion of a color offset print usually requires scanning, color separation, computer production, plate making, printing, and postpress processing. Separation models, color separation equipment, plate-making output devices, printing presses, inks, paper, etc. all affect print quality. From manuscripts to color separations, color separations to printing plates, printing plates to printing presses, and final completion of the printing press, errors may occur at every stage. Each printing company has mastered a great deal of experience through many years of practice. Each skilled printing operator has his own set of methods for solving problems based on his years of experience. However, high-precision printing technology is more difficult to grasp. It is an indisputable fact that high quality is difficult to control.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. Today, color scientists all over the world continue to provide many valuable methods for the perception, measurement, and reproduction of color, enabling people to think new ways about printing technology and quality, seek new methods, and continue to take a new height. With the advancement of computer high-speed computing storage and software massive retrieval capabilities, we have been able to support us to further understand the characteristics of color, grasp the key technologies of copying color and reproduction tone, and make up for the lack of original printing theory and technology.
Combining the prepress separation and printing synthesis as a complete system for research and harmonization, effectively controlling and avoiding problems in all aspects of the offset printing technology, minimizing errors, making the print faithful to the original or higher than the original, is the offset printing The highest requirements put forward by technology are also the basic tasks of high-precision offset printing technology.
High-precision offset printing technology is the proposition that the author put forward in 2005 on the basis of absorbing the crystallization of previous thinking and summarizing the "high-grade plate printing technology research and development" technology. This proposition is implemented in research projects such as the research and development of high-quality plate printing technology for ordinary PS plates, the database of high-precision offset printing technology, the demonstration of high-precision offset printing technology, and the research and development of multi-color high-precision color image printing and copying technology. During the process, we constantly made breakthroughs and gradually improved.
High-precision offset printing technology adopts the principle of traditional color separation to study the classification methods and characteristics of images, create more scientific subdivision methods, create high-precision color separation models, and solve important and difficult problems of color separation and color correction. It is a traditional offset printing technology. The inheritance and promotion. High-precision offset printing technology, which combines prepress separation and printing synthesis as a complete system for research and coordination, effectively controls and avoids problems in all aspects of offset printing technology, minimizes errors, and is the innovation and development of traditional offset printing technology. High-precision offset printing technology application of standardized production, data methods and means, create model development software to eliminate the error caused by the use of different equipment, and the error correction operation is very convenient and effective, is the offset printing technology control theory innovation and development. The printed matter produced by using high-precision offset printing technology has advantages and characteristics such as high definition, bright color, strong three-dimensionality, and good light perception. Its technical specifications are in line with the current international and national standards systems, and its index value exceeds the standard expectation, breaking the traditional offset printing technology. The bottleneck of quality, high-precision offset printing technology partially compensated for the lack of original printing theory and technology.
High-precision offset printing technology is a high-tech printing process design and control technology. Its technical structure is: high-precision screening color separation printing technology, high-density printing and copying technology, high-saturation printing and copying technology, long-graded level reproduction technology, color management control technology, high-precision offset printing technology standards.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. High-precision offset printing technology is the author's proposition in 2005, its technical structure is: high-precision screening color separation technology, high-density printing and copying technology, high saturation printing and copying technology, long-graded hierarchical replication technology, color management and control Technology, high precision offset printing technology standards. High-precision offset printing technology is the inheritance and development of traditional offset printing technology, and it is a practical digital technology for standardized and digitalized high-quality offset printing production. The use of this technology to produce prints has the advantages and characteristics of high-definition, bright colors, strong three-dimensional effect, and good light perception. High-precision offset printing technology makes color and level quality control no longer a technically very strong matter.
Printing is an ancient technique and it is one of the four great inventions in ancient China. The invention of offset printing technology was a matter of the 20th century. Although the history is short, the development is very fast and there are many academic schools.
Modern offset printing technology is a comprehensive application technology that integrates light, machine, electricity, chemistry, computer, color science and aesthetics. It belongs to the high-tech field, and its technology is complex and its technical requirements are high. The completion of a color offset print usually requires scanning, color separation, computer production, plate making, printing, and postpress processing. Separation models, color separation equipment, plate-making output devices, printing presses, inks, paper, etc. all affect print quality. From manuscripts to color separations, color separations to printing plates, printing plates to printing presses, and final completion of the printing press, errors may occur at every stage. Each printing company has mastered a great deal of experience through many years of practice. Each skilled printing operator has his own set of methods for solving problems based on his years of experience. However, high-precision printing technology is more difficult to grasp. It is an indisputable fact that high quality is difficult to control.
The printing industry is undergoing a technological revolution. The industrial base is evolving and has spread to every aspect. Today, color scientists all over the world continue to provide many valuable methods for the perception, measurement, and reproduction of color, enabling people to think new ways about printing technology and quality, seek new methods, and continue to take a new height. With the advancement of computer high-speed computing storage and software massive retrieval capabilities, we have been able to support us to further understand the characteristics of color, grasp the key technologies of copying color and reproduction tone, and make up for the lack of original printing theory and technology.
Combining the prepress separation and printing synthesis as a complete system for research and harmonization, effectively controlling and avoiding problems in all aspects of the offset printing technology, minimizing errors, making the print faithful to the original or higher than the original, is the offset printing The highest requirements put forward by technology are also the basic tasks of high-precision offset printing technology.
High-precision offset printing technology is the proposition that the author put forward in 2005 on the basis of absorbing the crystallization of previous thinking and summarizing the "high-grade plate printing technology research and development" technology. This proposition is implemented in research projects such as the research and development of high-quality plate printing technology for ordinary PS plates, the database of high-precision offset printing technology, the demonstration of high-precision offset printing technology, and the research and development of multi-color high-precision color image printing and copying technology. During the process, we constantly made breakthroughs and gradually improved.
High-precision offset printing technology adopts the principle of traditional color separation to study the classification methods and characteristics of images, create more scientific subdivision methods, create high-precision color separation models, and solve important and difficult problems of color separation and color correction. It is a traditional offset printing technology. The inheritance and promotion. High-precision offset printing technology, which combines prepress separation and printing synthesis as a complete system for research and coordination, effectively controls and avoids problems in all aspects of offset printing technology, minimizes errors, and is the innovation and development of traditional offset printing technology. High-precision offset printing technology application of standardized production, data methods and means, create model development software to eliminate the error caused by the use of different equipment, and the error correction operation is very convenient and effective, is the offset printing technology control theory innovation and development.
The printed matter produced by using high-precision offset printing technology has advantages and characteristics such as high definition, bright color, strong three-dimensionality, and good light perception. Its technical specifications are in line with the current international and national standards systems, and its index value exceeds the standard expectation, breaking the traditional offset printing technology. The bottleneck of quality, high-precision offset printing technology partially compensated for the lack of original printing theory and technology.
High-precision offset printing technology is a high-tech printing process design and control technology. Its technical structure is: high-precision screening color separation printing technology, high-density printing and copying technology, high-saturation printing and copying technology, long-graded level reproduction technology, color management control technology, high-precision offset printing technology standards.
2) High-density printing and copying technology
Density, also known as optical density, is the characteristic measure of light absorbed by an object, ie, the ratio of the amount of incident light to the amount of reflected light or transmitted light. It can be divided into reflection density and transmission density, and expressed in terms of the decimal logarithm of the reflectivity or transmittance of the inverse. The brightness of the image can be expressed as a density. Bright tone refers to the bright tone on the screen; dark tone refers to the dark tone on the screen; midtone refers to the tone between the bright tone and the dark tone on the screen.
High-density printing and copying technology means that the highest density of four-color prints is Dmax=2.0~2.4, which is much higher than the highest density of traditional four-color prints, Dmax=1.8. This indicator has a large difference between bright and dark tone, many layers, and excellent level curves, and has a strong three-dimensional image and good texture. The reason is: On the one hand, the hierarchy refers to the density level from the brightest to the darkest tone on the image. Levels are usually measured with a ruler. How much the level determines the color change and texture on the screen. On the other hand, the relationship between the original density and the replica density is called a hierarchical curve.
This high-density index is unimaginable for traditional four-color printing technologists, because when Dmax>1.8, the traditional four-color printing control method is easy to cause quality accidents such as paste printing and large color deviation. The high-precision offset printing technology can use the UCR process to find the dot deformation rules, correct the color separation and mathematical model of printing synthesis, make up for deviations, and easily achieve high-density print reproduction. Of course, it is also important to use domestic inks with good coloring power and good printing performance, and it is necessary to perform Lab value test and printability test on the ink.
3) High saturation print replication technology
Saturation refers to the purity of the color, indicating the degree to which the object reflects or transmits color light. The monochromatic light in the visible spectrum has the highest saturation.
The law of color substitution states that any color C can be matched by a mixture of a certain amount of monochromatic light Cλ with a wavelength λ and a certain amount of white light W: C=Cλ+W. Therefore, the saturation of one color can be understood as the proportion of the monochromatic light Cλ that matches this color to the total light. S represents saturation, then S=Cλ/C=Cλ/(Cλ+W). Therefore, only the difference in brightness is achromatic.
High-saturation printing and copying technology requires UCA ground color gain process using non-color structure GCR technology, and also needs to use CIELAB color difference formula to correct color separation and printing synthesis mathematical model.
4) Long-order tone level replication technology
The long-graded hierarchical copying technology is based on the high-density printing and copying technology of the printing and copying technology, and it depends on the improvement of the highest density Dmax of the printed matter, and more on the improvement of the level curve. The Offset Process Technology Database 2006 software developed with high-precision offset printing technology eliminates dot-pass errors and improves the characteristics of hierarchical curves. The use of long-graded hierarchical replication technology network dot area ratio of 2% to 97% of the outlets, can be completely reproduced in the print; 50% of the dot gain value is less than 16%.
5) Color Management Control Technology
Select a typical color management module CMM to measure the colorimetric CIELAB color parameters.
Plot the chromaticity point C in the a/b two-dimensional coordinate system. The luminance point L is drawn in the color/color brightness two-dimensional coordinate system. Compare the color scale characteristics of the high-precision offset color separation model and the conventional four-color color separation model. The color separation algorithm will affect the color scale characteristics of printed colors. The color gamut linearity of the color input mode is compared with the color separation printing. The higher the linear similarity, the better the color separation algorithm.
Due to the selection of a typical color management module CMM for testing and application of excellent dot-error elimination techniques, the use of high-precision offset printing technology, the print color deviation ΔE is less than 2.5.
6) High-precision offset printing technology standard
High-precision offset printing technology is independently developed by the Institute of Printing Technology of Yunnan Province. Its technical specifications are in line with the current national standards GB/T17932.2-1999 and the international standard ISO12647-21996 index system, exceeding its expected value.
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