According to the relevant requirements of international trade, the weight of a single corrugated box should be controlled at 20~25kg. China's standards stipulate that the maximum weight of a single packing box is 18kg, and the weight of a single package of corrugated cartons of general consumer goods is 20kg. Due to the product structure, large and medium-sized cartons can not be subject to weight restrictions, such as sports equipment, large home appliances and other special products. From the point of view of user packaging cost, within the prescribed standard range, under the premise of meeting the handling, storage, use performance, the production of a slightly larger size of cartons can increase the number of product clothing, reduce the number of cartons used, relatively economical. Take the outer packaging of a beverage as an example, if the paper material remains unchanged or slightly increased, the 12 bottles to 24 bottles, not only can save the cost of base paper material by about 35%, but also the total amount and cost of printing and post-printing processing will be greatly reduced. It can be said that the change of packaging specifications is indeed a big "profit" for customers. In addition, considering the rationality of the internal product structure corresponding to the carton length, width, height, such as in the condition of the same quantity and weight, the height of the carton and increase the length or width of the carton, although increased the paper area, but reduce the height of the compressive strength of the carton also improved, can effectively prevent or reduce the product damage in the process of logistics.

Strength —— multi-party consideration

In addition to solving the difficulties in the pre-press production through exquisite thinking, the designers should also deepen the understanding of the printing process to avoid the mistakes that should not occur. If the large area layout that could be printed with special color is designed as a four-color network; the small text into four-color overprinting; the yellow background color plate into hollow layout for black text overprinting, due to the strong contrast between yellow and black, the situation of overprinting will be more prominent. Designers must pay attention to the rationality of the plate-making process, in order to improve the printing production efficiency and product quality to lay a solid foundation.

The printing suitability of different paper is completely different. If there is no "corresponding process measures according to the material conditions", it will bring some problems to the normal production. But even if the same type of paper, due to different brands or different manufacturers in the paper materials and process differences, will also make the quality of base paper, printing suitability there are certain differences. If some white paper sheets, white paper sheets and glass cards are acidic, the ink drying is slow after printing, which will lead to difficult overprinting of semi-finished products and significantly increase the rate of unqualified products; some low-grade white paper sheets and glass cards have poor surface strength, and easy quality faults such as powder loss, hair loss, foaming or peeling in the printing process.

◆ If the multi-color unit printing is used and the color group is redundant, the front color group can be empty for air printing to remove paper powder and paper hair, to avoid or reduce quality faults.

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The aluminum stamping decoration process is expensive, the decoration quality effect is outstanding, it is the ideal choice for high-grade product packaging. But it should be noted that aluminum electrochemical is not suitable for application in corrugated boxes, more suitable for hardcover corrugated color box or white paper plate, glass card as the bearing color box products. For color box products with electrochemical hot printing process, attention should be paid to controlling the amount of coating and drying of the ink layer in the printing process, so as not to cause quality problems such as hot stamping or hot stamping layout.

Reasonable design of corrugated carton, color box molding process, on the one hand, we should pay attention to the reasonable design of the die-cut version and the technical control of the indentation process, on the other hand, we should pay attention to the product lap tongue and shaking of the tongue buckle structure design.

Because the corrugated box, corrugated color box has a certain thickness, so in the production of die cut version, should consider the die cut version design from the reverse side, so that the folding molding line is not easy to deviate, but also can reduce the inner diameter size reduction, is conducive to improving the accuracy of product molding. Die-cut plate should also pay attention to the adjustment of the pressure, the pressure is uneven or too light, easy to make the molding error.

Another important control link of the molding process is the design of the box tongue structure. A little mistake will appear quality problems, such as the length and width of the tongue is not enough, and the indentation line of the two edges of the tongue break is not designed to open (broken line) structure, it is easy to cause the tongue buckle is not closed, affecting the quality of the product packaging. Once the author's enterprise produced a small packaging box, because the design technology of the die-cutting version is not in place, the tongue of the sample box formed in the elasticity of the cardboard itself, the phenomenon of natural sliding out. Later, we opened a 5mm "one" opening at the crease on both sides of the box tongue, so that the opening on both sides of the tongue crease could slightly cover the edge of the corresponding left and right sides, so that the tongue of the cardboard box would no longer slide out, and the phenomenon of the paper box is not tight. It can be seen that designers must pay attention to details, in order to make the product to obtain a more satisfactory quality effect.

The reasonable design of corrugated box and color box products is actually the reasonable design and appropriate control of every step in the whole production process of pre-press, printing and post-press processing. In addition to having a certain theoretical knowledge, designers should also strengthen the summary of printing production experience and process analysis, in order to constantly improve and innovate the process technology.