It is generally used as a mid-range packaging method, between the inner packaging and the outer packaging. As the name suggests, the color box is generally composed of several colors, giving people a strong visual sense, so that buyers and users have a little understanding of the overall appearance and color of the product. What are the detection technologies for the printing quality of color box packaging?

1. Inspection and control of printing quality of special materials

In the color box packaging, the application and innovation of special materials and new materials is a trend, such as the development of cigarette packs from paper soft packs and cardboard hard packs to aluminum foil gold and silver cardboard hard packs. These high-gloss composite or coated materials have metallic luster and refraction surface. After being printed with exquisite patterns of various colors, people feel high-end and elegant, which can greatly increase the value-added space of products, and are widely used in high-end color boxes.

Such high-gloss surface materials have strong metallic luster due to the smooth surface coating, and strong specular reflection occurs when incident light is irradiated. Therefore, the color appearance of the surface of the object will change with the change of the observation angle, which makes it difficult to control the color in the printing production process, so that the printing factory is faced with ensuring that the same batch of printed products, and even different batches of printed products, have the same ink color. The quality control problem and its special testing technical requirements.

2. Detection and control of spot color printing quality

In the printing of color box packaging products, because spot color printing has a large area of solid color blocks, the color is dazzling, and the shelf display effect is good; the color difference caused by dot overprinting and dot deformation is reduced, and the color is stable and easy to identify. Therefore, a large number of special Color printing is its basic feature.

At present, domestic color box printing enterprises are relatively backward in the measurement and control methods of spot color, and most of them are still in the stage of blending spot color ink by relying on the experience of workers and masters. The proportion of spot color ink is not accurate enough, the blending time is long, and the subjective factors have a great influence. shortcoming. Therefore, the use of color matching system is the best solution to the problem, and it is also the mainstream technology and development direction of international color box quality control and inspection.