Offset printing is the most mature printing method today and occupies a primary position in packaging color box printing. There is no distinction between the graphic and text parts and the blank part on the printing plate. They are almost on the same plane. When printing from china, water is first applied to the printing plate, and then ink is supplied to the printing plate. The principle of mutual repulsion of ink is used to complete printing. Its plate making process is simple, low cost, high printing efficiency, exquisite patterns and stable quality. However, the offset printing method is not suitable for linkage line production and has low efficiency.

There are two main ways to use offset printing for color box printing. One is to print directly on the cardboard, and the other is to print the paper first and then mount on gray board.

Among them, the direct printing method has high printing quality because it is pre-printing on a single sheet of paper. After printing, it can also be decorated with glazing, lamination and other surface decorations, which can greatly improve the appearance effect of the color box. In the high-end products, it has always occupied an important position in sales packaging. However, the laminating processing efficiency is low.

The direct printing method is mainly aimed at micro-corrugated products. This method is widely used in foreign markets and is relatively mature. An improved offset printing machine can be used during production. For example, the Roland 900 large-format printing machine is capable of direct printing of corrugated cardboard. This printing method can effectively ensure the formability of the color box and achieve exquisite printing effects without losing limited cardboard strength. But the equipment investment cost is still relatively high.

The application of digital printing methods is the development direction of color box printing. It can make graphic information directly from the computer to the surface of the paper, eliminating the need for central plate making and other links. Moreover, digital variable information is printed, and the content can be consistent and even Materials can be changed. On-demand, real-time and variability are the characteristics of digital printing.

But printing ethics is at most equal to traditional printing skills, and far higher than printing skills. The investment cost of a general digital printing machine is 40%-50% lower than that of traditional color boxes. Compared with traditional printing, its printing speed is faster and the cost per page is lower, giving it a competitive advantage. Among various digital printing methods, inkjet digital printing equipment has developed rapidly.

Digital printing method is a development direction for on-demand printing in the future. But compared with a large number of industrial packaging, there is still room for improvement in terms of printing speed and format. However, with the continuous development of personalization and product demand. Such as the production of corrugated cardboard display racks and small-volume trial packaging, digital printing methods will occupy a dominant position in this field.

Color boxes are continuing to transition to environmentally friendly packaging, which requires their product printing quality to be higher and higher. Of course, the requirements for green printing make the colors bright and meet the requirements of green environmental protection. This puts forward higher requirements for printing equipment and printing help materials.

In addition, the development and application of new color box products, such as miniature color boxes, heavy-duty color boxes, corrugated extended products, etc., have different characteristics and have also raised corresponding requirements for the printing process.

When it comes to the choice of printing methods, various printing methods will still exist at the same time for a long period of time. In the long run, the pre-printing process has higher printing quality and effect, avoiding the impact of printing on the strength of the cardboard. From an efficiency point of view, it can greatly shorten the production cycle and meet the customer’s requirements for timely supply. For high-quality, high-volume product manufacturing, pre-printing is undoubtedly the best method.

To improve the quality of color box printing, we must pay attention to the development of post-processing, products must meet market demand, and the quality of printed matter must be continuously improved. Printing processing involves many factors. Plate materials, equipment, ink, paper, environment, and operations must be strictly controlled. All processes must be closely coordinated to reduce production errors and increase corporate profits.