the color separation of Huaguang printing can't even expose the area, which is the reason why the ink can't achieve the expected color effect. In some areas, instead of synthesizing these four colors, a spot color is used, which is equivalent to putting an extra light source in the computer to illuminate a fixed position, so that the color of this position is constant and easy to control, so there is one more spot color, and one more spot color is one more film. The number of spot colors is generally based on the characteristics of the product. If there is a large area of the same color, a spot color is set. If the printed matter is all gradient colors, there will be no spot color. Huaguang electronic printing color separation system is developed by Weifang Huaguang Technology Co., Ltd. in cooperation with Shandong University, using Huaguang's advanced software and hardware technology combined with the process requirements of printing and plate making. It is a key scientific and technological project of China High-tech 863 Program and 95 Torch Program. The system integrates computer, laser, electronics and other high-tech technologies, and supports high-speed and high-quality image generation and editing and printing process processing. It is an open electronic printing color separation system with high stability, complete functions, easy expansion and quick and simple operation, which has reached the international advanced level, including sample scanning, pattern design and editing, moire processing and continuous drying output.