The use of digital printing technology for high simulation reproduction of artworks is inseparable from color management. Color management is the key and core of high simulation replication. Modern color management is based on color control technology with changes in color space. It realizes the realistic reproduction of colors through color space conversion. 1. Create a high-simulation copy color management system The color management of art reproduction technology refers to the management of the transfer of color spaces (such as scanners, monitors, and inkjet printers). Color management requires the color information to be as consistent as possible during the three processes of input, processing, and output, but the color expression in the transmission process involves not the same software and hardware for the color expression. Therefore, to maintain consistency and stability in the transmission of color information, standardized color management must be implemented. The high-simulation replication technology of digital printing researched and developed in this paper is to use coated rice paper, silk + new technology (Epson Stylus Pro 9800 inkjet printer) + new software (EFI color management software) to carry out high-simulation reproduction of colors management. Second, the method and steps of high simulation copy color management High simulation copy color management should use a standard ambient light source to keep the indoor light constant, so that the original color of the artwork is basically the same as the screen color and coated rice paper printing color. The following two aspects should be considered when selecting the light source: First, the better color temperature. The international standard standard recommends the basic observation lighting as a CIED50 standardized light source that matches the daylight spectral distribution of the relevant color temperature at 50000 K. The second is a fluorescent tube with a high display index, R value should be greater than 95% of the spectral display characteristics. The experiment uses the fluorescent tube of German JUS company to show that the index is 97% and can fully reflect the true color of the illuminated object. (1) Color management of the scanner One of the key links in the high-simulation copying of artworks is to perform physical scanning of the original work, and obtain all the required information from the original work at the beginning of the scan. This requires calibration of the scanner. The purpose of scanner calibration is to correct the brightness, contrast, and black and white fields of the scanning device to ensure that when the scanner is initialized to zero, the same image data can be obtained for the same original no matter when it is scanned. To achieve this goal, a scanner characteristic file must be established. Scanner calibration and characteristic file generation are completed with the help of 1T8.7 / 1 (standard transmission draft for scanning) or 1T8.7 / 2 (standard reflection draft for scanning) standard manuscript and scanner characteristic file generation software. The following are the specific steps for scanner calibration and characteristic file generation with the help of scanner characteristic file generation software Scanopen. 1. Turn on the scanner and the heat pipe 30 minutes in advance to ensure that the light emission of the lamp reaches a normal and stable state. 2. Clean the glass of the flatbed scanner stage. 3. When using the flatbed scanner, pay attention to align the edge of the color card with the frame of the stage to prevent the scanned image from tilting. 4. Start the scanning application, clear all the color adjustment, control and management options of the scanner, set the scanner, and record the setting status of the scanner in detail. 5. Open Scanopen, click "Start Generating Feature File", follow the prompts to select the entire color card, and then click the "Scan" button to scan the color card picture. 6. Check the "upper left corner", "upper right corner" and "lower right corner" of the color card according to the prompts. 7. Click the "Create Feature File" button to create an ICC feature file for the scanner. The feature file is completed. 8 Load test file and reference file: open the color management application software again, enter the color management option of the scanner, enter the digital image obtained by the scan card, that is, the test file, and then select the corresponding reference file in the reference folder and click "Open" button to send the selected reference file to the color management application software. 9. Create and save a configuration file: Click the "Create Configuration File" button to pop up the Save Configuration File dialog box. (2) Color management of microjet printers For digital printing highly simulated reproductions, careful color management of microjet printing is the most critical. Epson Stylus Pro 9800 inkjet printer + color management software + coated rice paper and silk are used to form the color management of the entire system. The specific color management steps are as follows: 1. Basic linearization of inkjet printers The basic linearization determines the physical characteristics of the pigment ink coated with rice paper, silk, and canvas. The inkjet printer optimizes the total inkjet volume and single-channel ink volume. That is, to obtain the largest possible color density with the best ink volume provides the foundation and optimized characteristics for the creation of artistic micro-jet printing coated rice paper and silk ICC files to establish the foundation of color management. The principle of the linearization of the inkjet printer is to correct the deviation of the printing color by checking and adjusting the density of each level of the microjet machine. Therefore, first adjust the micro-jet machine to the most stable working state. By using the GMG closed-loop correction technology to control the inkjet volume of the inkjet printer to achieve the unified color difference value of the new printing color table and the initial color difference value through the loop and accurate closed-loop color correction to ensure a repeatable and stable inkjet printing system. 2. Carefully establish the color space converted ICC file. Based on the created linearization file and the measured ink volume, through the Profile Maker color characteristic file generation software, an ICC file to be converted in Photoshop software is generated. This file is used to convert the RGB format to the CMYK format for inkjet printing , And print out the ECI 2002 color scale of coated substrates such as rice paper, and then measure the chromaticity value LAB of 1485 color patches by a spectrophotometer to generate a new ICC file, which is the basic database of the inkjet printer color management module, Reach the largest color gamut of coated substrates such as coated rice paper. At this time, the accuracy of color restoration reaches about 90%. 3. Carefully establish the final {CC file. Due to the complexity of inkjet printing colors, ICC files generated by only one color space conversion cannot achieve accurate color restoration, partial hue, partial gray balance and color deviation. Therefore, it is necessary to carefully modify and edit the ICC file after several color space conversions in combination with experience. This kind of modification is a fine and minute amount, which is an advanced finishing touch. This modification is an item of color management. The most important work makes the accuracy of color reproduction of micro-jet printing to a higher level. After careful modification and editing, excellent standard samples are printed, and the LAB values ​​of 1485 color patches are measured through Profile Make. The characteristic file generation software generates the final ICC file, and the accuracy rate of color restoration reaches about 97%, so that the color restoration of art micro-jet printing can be extremely effective. After the color management of the scanner and printer, and then scanning and printing the artwork, the accuracy of color reproduction of the original can be greatly improved to meet the actual production requirements. Patio Sofa,Outdoor Love Sofa,Wicker Garden Sofa,Plastic Outdoor Sofa Zhejiang Lifan Furniture.Co.,Ltd , https://www.lffoldingtable.com