With the rapid development of computer technology and network technology, computer color plate making technology has been widely used in practical production. Its advanced nature and scientific nature have brought a new historical period to the printing plate making industry, also to packaging and decorating, advertising design. Other industries have brought brilliant prospects.
Due to a complete computer color platemaking system, it is equipped with high-precision scanners, multiple MAC or PC machines for graphic processing, graphic output and high-speed transmission networks, large storage file servers, and printers; Therefore, in order for such equipment to give full play to their superiority and produce high-quality products, we must adopt the necessary data and testing methods for the entire work flow to find out the laws that can guide the management and production, and be regulated. It can be followed, there are Fan Ke, implementation of standardized, data-based, standardized scientific management.
A color plate to achieve good reproducibility and good repeatability, must do the standardization of scanning color separation, control the scanning quality of color images. For this purpose, we must first standardize the gray balance value according to the flowability conditions of the process and the subsequent process, determine the gray balance curve of the scanner, and ensure the relative stability of the gray balance curve. Secondly, it is necessary to standardize the calibration data for scanning white and black fields so that the quality of the scans will not be different due to differences in operators. It also regulates the color calibration curve and fine-level adjustments of the scan, correctly reproduces the saturation of the original color, the level and clarity of the color, and adjusts the gray balance curve, level curve, and color in time according to the ink and paper used in the product. Calibration curve and other parameters. Finally, we need to standardize the calibration of the black-tone tone. For different types of manuscripts, such as Chinese paintings and landscapes, we use different types of black-tone tones to make the restoration of images more accurate and realistic.
The color display is the image in process, and it is a great advantage of computer-making. The computer's color management software reduces the requirements for the operator, but the color display requirements for computer color monitors are even higher. Usually color display is RGB additive color display, color reproduction space is wide, bright colors; and print samples are CMYK subtractive color display, color reproduction space is narrow, gray color, the gap between the two is larger. In order to make the color reproduction of the two as close as possible and truly achieve WYSIWYG, it is necessary to correct the gamma value, brightness, color temperature value, and other related parameters of the color display by comparing printed products (or proofs) and screen images. A standard ambient light source is also used to keep the interior light constant, too bright and too dark will affect the colors displayed on the display screen; at the same time, a standard transmission light source shall be used to observe the transmitted originals to improve the accuracy of color adjustment.
The linear adjustment of the image-setter can guarantee that the dot value displayed after the scanning and color separation is consistent with the actual dot value on the film. To do this, it is important to fix the brand of the photosensitive material, the time for fixing the developer solution, the fixing solution, and the developing and fixing time, the temperature, the amount of automatic refilling, and the like. Under this condition, the density of the ash ladder is measured periodically by the density meter, the density of the gray density, and the dot values ​​at various levels. Based on these values, some parameters such as the laser light value and focal length of the imagesetter are adjusted to ensure linear output of the photosetter. Correctly reflect the quality and effectiveness of scanning.
Second, the strengthening of the computer process specification is a basic work for the standardization, data, and standardization of computer-based plate making. After the customer's manuscript is accessed by the salesman, he passes through the front desk and puts the customer's requirements on the standard version, such as the position, size, special effects, text color, font size, and size of the plate. Making parameters. After receiving the manuscript, the production process manager approves the characteristics of the manuscript, specifies the scanning process and the specific procedures for production, and provides imposition samples in accordance with the requirements for binding printing. The purpose of these basic tasks is to strengthen the preparatory work before production, and lay a good foundation for the subsequent standardized operations. After the apple or PC workstation operator receives the manuscript, he must strictly follow the layout requirements, use the software such as PhotoShop to do the special effects processing and conventional processing of all kinds of images, use Freehand and other software to process the graphic effects, and achieve standardized operations, such as : The black and black characters are black and white, and the projection of the white background is a black net of about 30%. The projection of the pressure background is 60% black, and the projection cannot be made of 4 colors. Typographers need to carefully complete the selection of text entry and font size as required, and then complete more standard page processing. In particular, when multiple people handle a book at the same time, pay attention to the unified specification of the parameters, including the unified page number, the book Etc. Finally, the black and white (color) printer outputs a sample for customer confirmation. The operator of the imposition workstation, while accurately completing the imposition work, must carefully collate the black-like verification of the page file converted by the PS, use the last-minute modification function, check the text, size, etc., so that it is basically correct. The final film output from the photo-composing machine shall be carefully checked by the quality inspector for text, images, color blocks, imposition, etc., and the proofs shall be sent for proofing after confirmation.
Three kinds of proofs are the bridges between the computer's plate making and printing. They not only correctly reflect the original tone and color, but also provide standard color proofs for printing. The traditional analog proofing needs to be accurate and stable in the color of ink samples. It is necessary to control and regulate the printing process. To make a high-quality printing plate, we must first ensure that the light source of the printing machine is stable and uniform in illumination, and determine the best exposure time; also fix the exposure, the brand of the plate, and the conditions for developing and fixing. Secondly, with 2% fine point out, 98% hollow spots are not pasted as standard, periodically test the variation of the light source, timely adjust the exposure time, improve the stability and repeatability of the printing plate, and replace the PS plate of a brand. Timely adjustment of various parameter settings. Finally, the working status of the proofing machine should be fixed, and the solid density value and dot gain rate should be controlled to improve the repeatability and stability of proofing. The stability of the proofing provides the correct feedback and reliable basis for adjustment of the gray balance curve of the front-end scanner and the correction of the display of the apple or the PC workstation, so that the computer-making plate truly embodies WYSIWYG.
As far as digital proofing is concerned, the color proofing of the printer must be carried out through standard proofs that have been completed in the traditional analog proofing process to ensure that the printer is in its best condition. Then, the colorimetric value of the colorimeter measurement is input into the printer profile generation software; the profile generation software compares and analyzes the colorimetric data of the original sample tag and the output color tag to generate a new printer profile that conforms to the existing production process. In order to achieve the digital color proofs and the color of the simulation proofs are basically the same.
The traditional carrier of the four hand-made plates is film, and the computer-based job carrier is a digital electronic file in the system. Therefore, the maintenance of the network system and the management of file files are another basic content of the standardized management of computer plates. To improve the efficiency of computer-based plate making, not only must the processing speed of the carrier content be improved in all aspects of the process flow, but also the digital management process must be introduced to properly arrange the storage location of electronic files in the system and the system data flow to avoid duplicate transmissions. A large amount of data files, and the use of optical disc recorders and other equipment, the file data archiving management, regular system backup, retention of information for customers, to facilitate the future revision and reprint, and timely vacate valuable disk space, Increase productivity.
Computer color plate making technology, technology links, involved a wide range, it is the decomposition of color, transmission of the network, but also the synthesis of color, file transfer and so on. One criterion for measuring the level of standardization of dataization is that one is reductive and the other is reproducible. Computer-based plates should be reducible and reproducible. There is no certain level of dataization. Therefore, we must proceed from the actual situation, start with the most basic work, and devise a set of standards and norms that can practically promote the application of symbols. The implementation of digitization, standardization, and standardized scientific management of computerized plates is only a means. The real purpose is to improve the quality of products, shorten the production cycle, reduce production costs, give full play to the superiority of advanced equipment, and increase production efficiency.
Due to a complete computer color platemaking system, it is equipped with high-precision scanners, multiple MAC or PC machines for graphic processing, graphic output and high-speed transmission networks, large storage file servers, and printers; Therefore, in order for such equipment to give full play to their superiority and produce high-quality products, we must adopt the necessary data and testing methods for the entire work flow to find out the laws that can guide the management and production, and be regulated. It can be followed, there are Fan Ke, implementation of standardized, data-based, standardized scientific management.
A color plate to achieve good reproducibility and good repeatability, must do the standardization of scanning color separation, control the scanning quality of color images. For this purpose, we must first standardize the gray balance value according to the flowability conditions of the process and the subsequent process, determine the gray balance curve of the scanner, and ensure the relative stability of the gray balance curve. Secondly, it is necessary to standardize the calibration data for scanning white and black fields so that the quality of the scans will not be different due to differences in operators. It also regulates the color calibration curve and fine-level adjustments of the scan, correctly reproduces the saturation of the original color, the level and clarity of the color, and adjusts the gray balance curve, level curve, and color in time according to the ink and paper used in the product. Calibration curve and other parameters. Finally, we need to standardize the calibration of the black-tone tone. For different types of manuscripts, such as Chinese paintings and landscapes, we use different types of black-tone tones to make the restoration of images more accurate and realistic.
The color display is the image in process, and it is a great advantage of computer-making. The computer's color management software reduces the requirements for the operator, but the color display requirements for computer color monitors are even higher. Usually color display is RGB additive color display, color reproduction space is wide, bright colors; and print samples are CMYK subtractive color display, color reproduction space is narrow, gray color, the gap between the two is larger. In order to make the color reproduction of the two as close as possible and truly achieve WYSIWYG, it is necessary to correct the gamma value, brightness, color temperature value, and other related parameters of the color display by comparing printed products (or proofs) and screen images. A standard ambient light source is also used to keep the interior light constant, too bright and too dark will affect the colors displayed on the display screen; at the same time, a standard transmission light source shall be used to observe the transmitted originals to improve the accuracy of color adjustment.
The linear adjustment of the image-setter can guarantee that the dot value displayed after the scanning and color separation is consistent with the actual dot value on the film. To do this, it is important to fix the brand of the photosensitive material, the time for fixing the developer solution, the fixing solution, and the developing and fixing time, the temperature, the amount of automatic refilling, and the like. Under this condition, the density of the ash ladder is measured periodically by the density meter, the density of the gray density, and the dot values ​​at various levels. Based on these values, some parameters such as the laser light value and focal length of the imagesetter are adjusted to ensure linear output of the photosetter. Correctly reflect the quality and effectiveness of scanning.
Second, the strengthening of the computer process specification is a basic work for the standardization, data, and standardization of computer-based plate making. After the customer's manuscript is accessed by the salesman, he passes through the front desk and puts the customer's requirements on the standard version, such as the position, size, special effects, text color, font size, and size of the plate. Making parameters. After receiving the manuscript, the production process manager approves the characteristics of the manuscript, specifies the scanning process and the specific procedures for production, and provides imposition samples in accordance with the requirements for binding printing. The purpose of these basic tasks is to strengthen the preparatory work before production, and lay a good foundation for the subsequent standardized operations. After the apple or PC workstation operator receives the manuscript, he must strictly follow the layout requirements, use the software such as PhotoShop to do the special effects processing and conventional processing of all kinds of images, use Freehand and other software to process the graphic effects, and achieve standardized operations, such as : The black and black characters are black and white, and the projection of the white background is a black net of about 30%. The projection of the pressure background is 60% black, and the projection cannot be made of 4 colors. Typographers need to carefully complete the selection of text entry and font size as required, and then complete more standard page processing. In particular, when multiple people handle a book at the same time, pay attention to the unified specification of the parameters, including the unified page number, the book Etc. Finally, the black and white (color) printer outputs a sample for customer confirmation. The operator of the imposition workstation, while accurately completing the imposition work, must carefully collate the black-like verification of the page file converted by the PS, use the last-minute modification function, check the text, size, etc., so that it is basically correct. The final film output from the photo-composing machine shall be carefully checked by the quality inspector for text, images, color blocks, imposition, etc., and the proofs shall be sent for proofing after confirmation.
Three kinds of proofs are the bridges between the computer's plate making and printing. They not only correctly reflect the original tone and color, but also provide standard color proofs for printing. The traditional analog proofing needs to be accurate and stable in the color of ink samples. It is necessary to control and regulate the printing process. To make a high-quality printing plate, we must first ensure that the light source of the printing machine is stable and uniform in illumination, and determine the best exposure time; also fix the exposure, the brand of the plate, and the conditions for developing and fixing. Secondly, with 2% fine point out, 98% hollow spots are not pasted as standard, periodically test the variation of the light source, timely adjust the exposure time, improve the stability and repeatability of the printing plate, and replace the PS plate of a brand. Timely adjustment of various parameter settings. Finally, the working status of the proofing machine should be fixed, and the solid density value and dot gain rate should be controlled to improve the repeatability and stability of proofing. The stability of the proofing provides the correct feedback and reliable basis for adjustment of the gray balance curve of the front-end scanner and the correction of the display of the apple or the PC workstation, so that the computer-making plate truly embodies WYSIWYG.
As far as digital proofing is concerned, the color proofing of the printer must be carried out through standard proofs that have been completed in the traditional analog proofing process to ensure that the printer is in its best condition. Then, the colorimetric value of the colorimeter measurement is input into the printer profile generation software; the profile generation software compares and analyzes the colorimetric data of the original sample tag and the output color tag to generate a new printer profile that conforms to the existing production process. In order to achieve the digital color proofs and the color of the simulation proofs are basically the same.
The traditional carrier of the four hand-made plates is film, and the computer-based job carrier is a digital electronic file in the system. Therefore, the maintenance of the network system and the management of file files are another basic content of the standardized management of computer plates. To improve the efficiency of computer-based plate making, not only must the processing speed of the carrier content be improved in all aspects of the process flow, but also the digital management process must be introduced to properly arrange the storage location of electronic files in the system and the system data flow to avoid duplicate transmissions. A large amount of data files, and the use of optical disc recorders and other equipment, the file data archiving management, regular system backup, retention of information for customers, to facilitate the future revision and reprint, and timely vacate valuable disk space, Increase productivity.
Computer color plate making technology, technology links, involved a wide range, it is the decomposition of color, transmission of the network, but also the synthesis of color, file transfer and so on. One criterion for measuring the level of standardization of dataization is that one is reductive and the other is reproducible. Computer-based plates should be reducible and reproducible. There is no certain level of dataization. Therefore, we must proceed from the actual situation, start with the most basic work, and devise a set of standards and norms that can practically promote the application of symbols. The implementation of digitization, standardization, and standardized scientific management of computerized plates is only a means. The real purpose is to improve the quality of products, shorten the production cycle, reduce production costs, give full play to the superiority of advanced equipment, and increase production efficiency.
Maochun Plastic & Ruber Hardware Co., Ltd. , http://www.gdmakeuppackaging.com