4 Density value color control method
However, there are other ways. Attracting attention from Polestar, QuebecorWorld, Scotland's George Stewart is Germinate's Press Signature product. Printing according to the target density value, and then measuring the tone on the signal bar, the Press Signature software not only provides dot gain, but also provides the reason why an incorrect dot gain appears on a specific print job and gives Suggested corrections. Once properly calibrated, the dot gain curve will be set in an ideal place to enable the printer to print a predictable print at the correct density value. All measurement work is only the location of the signal strips. With the help of Harlequn RIP, all data transmission is automatic, thus eliminating the cumbersome work of typing data.
The system provided by NCS to George Stewart ensures that all presses (regardless of their age) can print products of the same quality. In this way, it is possible to assign a job to different printing machines without affecting the consistency of the printing quality under a short period of time. The printing structure is exactly the same regardless of the type, location and culture of the printing press. Some vendors say that their goal is to achieve real-time data replication, real-time inventory and usage control, so they chose to install Press Signature on their presses.
Some company's production department managers can use the word “ecstasy†to describe the attitude of the Press Signature system. Especially when those same products need to be printed in different places all over the world, in order to guarantee the reputation of the printing company and the customer, it is necessary to control the image quality. They believe that this system is a masterpiece of quality control.
Canon built this Press Signature website so that printers can view their press run test strip data recorded by Press Signature. The purpose of doing so is to generate a graph that shows the dot gain area relative to the ideal target, and feed back the correction value to that printer through the software. Once the proposed corrections have been made or modified, the plate exposure system will compensate the press and the curve will return to the desired state. Any changes made will be reflected in the graphics returned to the site.
No matter where the presses are in Europe, if they all use this system, then they will get the same high-quality printing effect, which ensures that Canon's print quality can be measured. Soon, the software system for Canon printed products will have this software system.
And the software is an opportunity for small printers or remote printers. Once they have adopted the system, they set up a standard process for objectively assessing the print quality so that they can print high quality. The product. This objectivity is the key to the control of the printing process. Any operator who uses visual evaluation to make adjustments to the press can only undergo subjective changes. This change may be visually better, but it actually contains many other problems.
For example, if the magenta dot gain is too small, then the printer will compensate for more magenta ink, but in reality may get a more "dirty" color. Conversely, printing based on quantified data eliminates subjectivity issues. With this system, it is possible to avoid cumbersome densitometric calibrations and subjective evaluations, and the colors appear to be more “clean†and the printable color tone is also much larger.
5 Offset offset printing image color control
At present, the color quality control methods and effects of the domestic single lithographic printing press have been developed quite maturely, but relatively speaking, the control of the print quality of the rotary printing press has developed relatively slowly. With the continuous improvement of people's requirements for the quality of printed products, the corresponding color quality control methods and methods must also keep up with the requirements of the era, which promotes the research, development and use of color control systems for rotary printing presses. The emergence of the Closed Loop Color Control System has enabled the printing press quality to be solved. Since the first-generation closed-loop color control system was first introduced in Drupa 95, it has been estimated that more than 300 units have been sold. About 62% is the transformation of the original rotary machine, and the remaining 38% is installed on a new rotary machine. Of all these machines, publishing accounted for 49%, followed by commercial printing, which accounted for 29% of the total. Through investigation and analysis, the closed-loop color control system not only can improve the quality of rotary printing, but also can improve the efficiency, save preparation time and waste of pre-printing, and can use and allocate laborers more rationally, thereby maximizing the benefits of printing companies.
The closed-loop color control system is in contrast to the previously commonly used open-loop control system. In the open-loop control, when the printing machine is continuously operating without stopping, the operator regularly or irregularly takes the printed matter from the printing press onto the console, and then uses the instrument to measure or visually judge the printing quality. Make various adjustments to the press for different situations. The closed-loop color control system continuously scans and calculates the color test strip on the moving substrate through an imaging device, and feeds the data back to the center console of the printing ink to adjust or modify the thickness of the ink layer. At this point, the printing press continues to operate continuously. All tests and adjustments are performed automatically by the machine without subjective intervention by the operator. In addition to maintaining color quality consistency, this system also provides an effective method for real-time data acquisition for statistical process control and customer quality assurance.
6 Adaptive neural network combined with color difference color control technology
The principle of adaptive neural network combined with color difference detection for color control of offset printing images is mainly based on two considerations: 1) Self-adaptive neural network has self-learning, forming a closed-loop control structure during the offset printing process, making it at high speed In the printing production process, the printing press can be adjusted and maintained in an optimal state in the shortest time to avoid waste and affect the duration; 2) Chromatic aberration is a device-independent color measurement index, so the adaptive neural network can be established. The network color control model can adapt to various types of printing machines and substrates and improve the adaptation of color control technology. Currently, this color control technology is under research.
7 Conclusion
All in all, printing under the same standard can increase the quality and consistency of prints. If implemented properly, it can be less wasteful and reprinted. Judging from the current users of the system, this is no longer questionable.
However, there are other ways. Attracting attention from Polestar, QuebecorWorld, Scotland's George Stewart is Germinate's Press Signature product. Printing according to the target density value, and then measuring the tone on the signal bar, the Press Signature software not only provides dot gain, but also provides the reason why an incorrect dot gain appears on a specific print job and gives Suggested corrections. Once properly calibrated, the dot gain curve will be set in an ideal place to enable the printer to print a predictable print at the correct density value. All measurement work is only the location of the signal strips. With the help of Harlequn RIP, all data transmission is automatic, thus eliminating the cumbersome work of typing data.
The system provided by NCS to George Stewart ensures that all presses (regardless of their age) can print products of the same quality. In this way, it is possible to assign a job to different printing machines without affecting the consistency of the printing quality under a short period of time. The printing structure is exactly the same regardless of the type, location and culture of the printing press. Some vendors say that their goal is to achieve real-time data replication, real-time inventory and usage control, so they chose to install Press Signature on their presses.
Some company's production department managers can use the word “ecstasy†to describe the attitude of the Press Signature system. Especially when those same products need to be printed in different places all over the world, in order to guarantee the reputation of the printing company and the customer, it is necessary to control the image quality. They believe that this system is a masterpiece of quality control.
Canon built this Press Signature website so that printers can view their press run test strip data recorded by Press Signature. The purpose of doing so is to generate a graph that shows the dot gain area relative to the ideal target, and feed back the correction value to that printer through the software. Once the proposed corrections have been made or modified, the plate exposure system will compensate the press and the curve will return to the desired state. Any changes made will be reflected in the graphics returned to the site.
No matter where the presses are in Europe, if they all use this system, then they will get the same high-quality printing effect, which ensures that Canon's print quality can be measured. Soon, the software system for Canon printed products will have this software system.
And the software is an opportunity for small printers or remote printers. Once they have adopted the system, they set up a standard process for objectively assessing the print quality so that they can print high quality. The product. This objectivity is the key to the control of the printing process. Any operator who uses visual evaluation to make adjustments to the press can only undergo subjective changes. This change may be visually better, but it actually contains many other problems.
For example, if the magenta dot gain is too small, then the printer will compensate for more magenta ink, but in reality may get a more "dirty" color. Conversely, printing based on quantified data eliminates subjectivity issues. With this system, it is possible to avoid cumbersome densitometric calibrations and subjective evaluations, and the colors appear to be more “clean†and the printable color tone is also much larger.
5 Offset offset printing image color control
At present, the color quality control methods and effects of the domestic single lithographic printing press have been developed quite maturely, but relatively speaking, the control of the print quality of the rotary printing press has developed relatively slowly. With the continuous improvement of people's requirements for the quality of printed products, the corresponding color quality control methods and methods must also keep up with the requirements of the era, which promotes the research, development and use of color control systems for rotary printing presses. The emergence of the Closed Loop Color Control System has enabled the printing press quality to be solved. Since the first-generation closed-loop color control system was first introduced in Drupa 95, it has been estimated that more than 300 units have been sold. About 62% is the transformation of the original rotary machine, and the remaining 38% is installed on a new rotary machine. Of all these machines, publishing accounted for 49%, followed by commercial printing, which accounted for 29% of the total. Through investigation and analysis, the closed-loop color control system not only can improve the quality of rotary printing, but also can improve the efficiency, save preparation time and waste of pre-printing, and can use and allocate laborers more rationally, thereby maximizing the benefits of printing companies.
The closed-loop color control system is in contrast to the previously commonly used open-loop control system. In the open-loop control, when the printing machine is continuously operating without stopping, the operator regularly or irregularly takes the printed matter from the printing press onto the console, and then uses the instrument to measure or visually judge the printing quality. Make various adjustments to the press for different situations. The closed-loop color control system continuously scans and calculates the color test strip on the moving substrate through an imaging device, and feeds the data back to the center console of the printing ink to adjust or modify the thickness of the ink layer. At this point, the printing press continues to operate continuously. All tests and adjustments are performed automatically by the machine without subjective intervention by the operator. In addition to maintaining color quality consistency, this system also provides an effective method for real-time data acquisition for statistical process control and customer quality assurance.
6 Adaptive neural network combined with color difference color control technology
The principle of adaptive neural network combined with color difference detection for color control of offset printing images is mainly based on two considerations: 1) Self-adaptive neural network has self-learning, forming a closed-loop control structure during the offset printing process, making it at high speed In the printing production process, the printing press can be adjusted and maintained in an optimal state in the shortest time to avoid waste and affect the duration; 2) Chromatic aberration is a device-independent color measurement index, so the adaptive neural network can be established. The network color control model can adapt to various types of printing machines and substrates and improve the adaptation of color control technology. Currently, this color control technology is under research.
7 Conclusion
All in all, printing under the same standard can increase the quality and consistency of prints. If implemented properly, it can be less wasteful and reprinted. Judging from the current users of the system, this is no longer questionable.
Source: Packaging Project
Author: Wang Xiaohong Shanghai University
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