Corrugated board processing technology is mainly divided into two categories, namely automatic corrugated board production line production process and semi-automatic corrugated board production line production process. The production process of automatic corrugated board production line is widely used. It has the advantages of large production batch, large box forming volume and good quality of corrugated board. The corrugated board produced by this process is usually made into cartons through water-based printing, slotting, sticking and forming processes. The carton produced by this process is mainly used for transportation packaging. The production process of semi-automatic corrugated board production line is firstly printing surface paper, then laminating with corrugated core paper and board. The corrugated board produced by the process, the conventional use of die-cutting indentation, nail and other processes into the box. The paper box produced by this process has good molding quality and surface treatment effect. Cartons produced in this process can be used as sales packaging. Conventional carton printing is mainly flexo printing, offset printing and screen printing three kinds of 1. Flexo printing corrugated carton conventional flexo printing corrugated carton process is directly printed on corrugated board, using water-based ink, so some people call the process watermark. Flexo direct printing has the following characteristics: large format. The maximum width of a wide-format flexographic printer can reach 2.5m~2.8m. The price is low. Flexo printing resistance is very high, can be reused; Ink prices are also lower. Can be linked production, such as printing, slotting, indentation, booking, bundling and other machine can be completed. The strength of the carton is reduced less. Because flexo printing is light press printing, so on the strength of corrugated board is very small. The printing accuracy is not high. The number of network cables in conventional offset printing is 175 lines/inch, while the number of network cables in flexo printing cartons is 35 lines/inch to 65 lines/inch. It is a low precision printing method, and it is most suitable for printing text line draft. Plate making is easy and difficult, text line draft plate making is easy, four color image plate making is difficult. Printing quality stability is not good, mainly reflected in the printing ink depth is not easy to control. Flexo direct printing process is suitable for the first type of carton production process, currently in China's carton factory is widely used. 2. Offset printing corrugated carton Conventional offset printing corrugated carton adopts indirect printing method, that is, first printing the surface paper of the carton, and then mounting the printed surface paper on the corrugated board. Because the PS version of the resolution is relatively high, so you can print very fine printing patterns. At present, the vast majority of high-grade corrugated boxes used for sales packaging in China are offset printing products. Offset printing corrugated carton has the following characteristics: not suitable for the use of cardboard linkage production line, only suitable for the use of single-sided corrugated machine, low production efficiency. Format is limited, generally smaller than flexo carton format. Printing products are very fine, and the number of network cables can reach 150 lines/inch ~200 lines/inch. Plate making is easy, for PS plate conventional plate making. Can be used for surface finishing, such as film, glazing, etc. Printing costs are high. The printing quality is relatively stable. 3 screen printing corrugated carton screen printing corrugated carton process is used in direct printing. Because the screen version of the next ink rate is proportional to the screen hole distance, so the screen printing resolution is not high, the image accuracy is low, the conventional number of network cable is 60 lines/inch ~80 lines/inch. Screen printing corrugated boxes have the following characteristics: not suitable for linkage production line, low production efficiency. Printing format can be large or small. It can be printed before mounting and packing, or printed after mounting and packing. Suitable for printing non-fine products. The ink color of screen printing is thick, so its color saturation is high and the visual effect is strong, especially the spot color printing field, the effect is better. Plate making is easy and low cost. Low printing cost. The printing quality is relatively stable.