(Digital Technologies Will Drive Color Management Use)
Color management continued to grow in 2000, especially among publishers, prepress studios and printers. Some social imaginations have promoted this need, such as digital proofing, which is widely accepted in cross-media publishing in the digital imaging industry. Color control is clearly the best choice for digital proofing technology and applications to ensure consistency and color reproducibility across devices.
However, color management is not a panacea for optimizing images and retouching and correcting them. A bad manuscript cannot be perfectly present simply through color management. The purpose of color management is to process color information on the basis of the original, trying to maintain consistency and minimal loss. Manually correcting image data during processing requires an experienced operator, and the benefit of color management is that the operator can see accurate reproduction on the display during operation.
The color management of ICC profiles has now become an integral part of the digital workflow and the biggest challenge. The appearance of the PDF workflow has accelerated the printing operation, and the file can be transmitted through an ordinary data transmission medium or directly through the Internet using the electronic commerce method. At the same time, automated operations have been created to maintain color consistency and manage colors efficiently between prepress companies, design studios, and printers. Automating operations not only reduces the chance of errors, but also eliminates the need for repetitive labor when the ICC profile is applied to images and files separately. The main operations included in the automation operation are to convert general RGB files into files suitable for printing on different systems, or to complete the conversion from CMYK to CMYK (for example, from one printing process to another printing process); Analog Proofing RGB, Lab or CMYK data is converted to Postscript printer or RIP-recognizable data. Other RGB data like scanners or digital cameras want to convert Lab or CMYK data that can be output directly.
The standard color reproduction of a printing shop is much more complex than the traditional ICC features of a scanner, a display, and a digital color printer. The color reproduction of printed dots is influenced by the relevant process parameters of numerous analog/digital processes. It is impossible to make a simple profile for a printing press. Many parameters affect the color of prints, such as the production process (film imaging, analog/digital platemaking), the raw materials used (paper and ink types), the used printing process (including various printing characteristics), and operator-independent variables (ink supply, ink balance). The standardization of these different parameters is indispensable for the application of color management in the printing process. Which parameter standard (official or in-plant) is applied in production does not matter, it is important to achieve a certain standard in the form.
CTP is a process that requires a new standard. CTP production has no film and is widely used in digital proofing. The quality of direct platemaking can only be checked after the plate has been exposed. It has been successfully used on dedicated plate reading equipment, allowing users to check dot area, size and resolution, screen angle, and more. In addition, the plate reading device can also calibrate the CTP device by checking the grey scale of the plate. The dedicated portable plate reader analyzes the exposed and unexposed dots on the surface of the printing plate through multiple rows of CCD optics. The CCD device uses the circumference of dots to calculate the dot area instead of the reflection of light.
The extension of the digital workflow in the printing shop In order to obtain the printer's profile, the digital workflow must be extended to the press shop. The workflow can be divided into two phases: the sequencing of sub-processes, and the parametric information accompanying these processes. Here, the most important is these parameter information, including the color. Color is an important factor that is almost ignored in the workflow, mainly due to the measurement method used. Using a densitometer to measure the incomprehensibility of anger during color transfer is not suitable. The information conveyed by the transparent color is understood by the human eye, and the evaluation of the color is based on the mixed spectrum. However, this method is still very important for verifying the quality of the standard. This trend is currently prevalent in the printing industry, using more than four colors for printing, while the need for credibility and the ability to communicate information between customers and suppliers are more easily understood, resulting in an increase in spectral measurement applications. Compared with the density measurement, the spectral measurement is more accurate for color analysis and describes the color according to international conventions and is more accurate. The measured data can be used to prove that the color coordinates of a hue on the printed proofs are consistent with the customer's special color coordinates. Color is the carrier and sample of printing. The final product can control the target value through the requirements in the production process to ensure consistency.
The main goal of extending digital workflows to presses is to minimize boot time and waste. All that is required when the job is sent to the press is to quickly set the ink correctly and keep it essentially constant throughout the printing process. This requires a device that can automatically detect any position of the image and confirm that this is the color the customer ultimately wants.
This also brings benefits for paper saving because the control strip is not placed on the edge of the paper but in the area where there is no image in the paper and is removed during post-processing. At the same time, the system also has the function of feeding back information to the operator of the printing press, and the output information is displayed so that the operator of the printing press can simply understand the information and adjust the ink amount of the printing press.
What about the future of color management? There is no doubt that the price of equipment will continue to decline, the use of the system will become more and more simple, and color management will be more widely used by designers. This will make the relationship between designers and prepress service providers and printers even closer, and will make color information transfer faster, more consistent, and free from sutures.
Color management continued to grow in 2000, especially among publishers, prepress studios and printers. Some social imaginations have promoted this need, such as digital proofing, which is widely accepted in cross-media publishing in the digital imaging industry. Color control is clearly the best choice for digital proofing technology and applications to ensure consistency and color reproducibility across devices.
However, color management is not a panacea for optimizing images and retouching and correcting them. A bad manuscript cannot be perfectly present simply through color management. The purpose of color management is to process color information on the basis of the original, trying to maintain consistency and minimal loss. Manually correcting image data during processing requires an experienced operator, and the benefit of color management is that the operator can see accurate reproduction on the display during operation.
The color management of ICC profiles has now become an integral part of the digital workflow and the biggest challenge. The appearance of the PDF workflow has accelerated the printing operation, and the file can be transmitted through an ordinary data transmission medium or directly through the Internet using the electronic commerce method. At the same time, automated operations have been created to maintain color consistency and manage colors efficiently between prepress companies, design studios, and printers. Automating operations not only reduces the chance of errors, but also eliminates the need for repetitive labor when the ICC profile is applied to images and files separately. The main operations included in the automation operation are to convert general RGB files into files suitable for printing on different systems, or to complete the conversion from CMYK to CMYK (for example, from one printing process to another printing process); Analog Proofing RGB, Lab or CMYK data is converted to Postscript printer or RIP-recognizable data. Other RGB data like scanners or digital cameras want to convert Lab or CMYK data that can be output directly.
The standard color reproduction of a printing shop is much more complex than the traditional ICC features of a scanner, a display, and a digital color printer. The color reproduction of printed dots is influenced by the relevant process parameters of numerous analog/digital processes. It is impossible to make a simple profile for a printing press. Many parameters affect the color of prints, such as the production process (film imaging, analog/digital platemaking), the raw materials used (paper and ink types), the used printing process (including various printing characteristics), and operator-independent variables (ink supply, ink balance). The standardization of these different parameters is indispensable for the application of color management in the printing process. Which parameter standard (official or in-plant) is applied in production does not matter, it is important to achieve a certain standard in the form.
CTP is a process that requires a new standard. CTP production has no film and is widely used in digital proofing. The quality of direct platemaking can only be checked after the plate has been exposed. It has been successfully used on dedicated plate reading equipment, allowing users to check dot area, size and resolution, screen angle, and more. In addition, the plate reading device can also calibrate the CTP device by checking the grey scale of the plate. The dedicated portable plate reader analyzes the exposed and unexposed dots on the surface of the printing plate through multiple rows of CCD optics. The CCD device uses the circumference of dots to calculate the dot area instead of the reflection of light.
The extension of the digital workflow in the printing shop In order to obtain the printer's profile, the digital workflow must be extended to the press shop. The workflow can be divided into two phases: the sequencing of sub-processes, and the parametric information accompanying these processes. Here, the most important is these parameter information, including the color. Color is an important factor that is almost ignored in the workflow, mainly due to the measurement method used. Using a densitometer to measure the incomprehensibility of anger during color transfer is not suitable. The information conveyed by the transparent color is understood by the human eye, and the evaluation of the color is based on the mixed spectrum. However, this method is still very important for verifying the quality of the standard. This trend is currently prevalent in the printing industry, using more than four colors for printing, while the need for credibility and the ability to communicate information between customers and suppliers are more easily understood, resulting in an increase in spectral measurement applications. Compared with the density measurement, the spectral measurement is more accurate for color analysis and describes the color according to international conventions and is more accurate. The measured data can be used to prove that the color coordinates of a hue on the printed proofs are consistent with the customer's special color coordinates. Color is the carrier and sample of printing. The final product can control the target value through the requirements in the production process to ensure consistency.
The main goal of extending digital workflows to presses is to minimize boot time and waste. All that is required when the job is sent to the press is to quickly set the ink correctly and keep it essentially constant throughout the printing process. This requires a device that can automatically detect any position of the image and confirm that this is the color the customer ultimately wants.
This also brings benefits for paper saving because the control strip is not placed on the edge of the paper but in the area where there is no image in the paper and is removed during post-processing. At the same time, the system also has the function of feeding back information to the operator of the printing press, and the output information is displayed so that the operator of the printing press can simply understand the information and adjust the ink amount of the printing press.
What about the future of color management? There is no doubt that the price of equipment will continue to decline, the use of the system will become more and more simple, and color management will be more widely used by designers. This will make the relationship between designers and prepress service providers and printers even closer, and will make color information transfer faster, more consistent, and free from sutures.
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