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.
First, color platemaking to achieve good reproducibility and good repeatability, must be done to standardize scanning color separation operations, control the scanning quality of good 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, to strengthen the computer operation process specification is a basic work of computerized plate standardization, data, standardization management. 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 various special effects and conventional processing of the image, use Freehand and other software to process the graphic effects, and achieve standardized operation. (To be continued)
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.
First, color platemaking to achieve good reproducibility and good repeatability, must be done to standardize scanning color separation operations, control the scanning quality of good 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, to strengthen the computer operation process specification is a basic work of computerized plate standardization, data, standardization management. 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 various special effects and conventional processing of the image, use Freehand and other software to process the graphic effects, and achieve standardized operation. (To be continued)
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