Cartons generally use three or five floors, and the seventh floor is rarely used. Each layer is divided into lining paper, corrugated paper, core paper and facial paper. The inner paper includes paperboard, kraft paper and corrugated paper for core paper. All kinds of paper have different colors and feel, and the paper produced by different manufacturers is also different. It is usually used as the packaging of goods or the external protective layer of goods. The size of cartons varies with the size of goods. Cartons usually have the following characteristics: handle with care, fear of moisture, upward, limited stacking, fear of sunlight, moisture-proof, quality and safety, no tumbling, no trampling, attention to fire prevention, fragile items, environmental protection, fear of heat and fear of food. Influence of plate-making quality control on printing process: There are many factors that affect the quality of printed matter, but if there are problems in the pre-press plate-making process, it is impossible to produce qualified printed matter even if the printing materials used are no matter how good, the quality of the printing machine is no matter how beautiful the binding is. The process of plate making, especially the random quality control of several important processes, will greatly affect the quality and efficiency of printing plate making. -The misunderstanding of carton flexographic plate making: The misunderstanding of carton plate making refers to various problems caused by the misunderstanding of plate making process by producers. If we can understand and avoid these misunderstandings, we can effectively avoid various situations in the production of printing plates, thus improving the quality of printing plates. Control of film effect in prepress plate-making: film plays a vital role in prepress plate-making, and the quality of printed matter has been determined by the production of film. Therefore, how to choose and use film to achieve the best output effect is very important. Screen protection technology of color separation plate-making: Screen protection technology of color separation plate-making in flexographic plate-making refers to an effective way of typesetting and color separation by fully considering the specific characteristics, color sequence and various printing problems that may occur in the production process of printed words and patterns. Through the introduction of pad screen protection technology, various printing problems and printing failures in the use of printing plates are reduced. carton