A plastic box is a kind of packaging box and refers to PP. PVC, PET/APET are the outer box of the product processed through a series of processes such as printing, die-cutting and sticking boxes. Compared with other packages such as traditional paper boxes, the plastic box has the advantages of environmental protection, non-toxic, high transparency, and can effectively improve the product packaging grade.
1. The relationship between the smoothness of the plastic box and the color rendering effect
Smoothness is a technical index for evaluating the degree of surface roughness of a plastic box, and is a physical quantity indicating that the surface of the plastic box is flat, smooth, and uniform, that is, under a certain vacuum condition, a certain volume of air is tested under certain pressure from a plastic box. The time required to flow between the surface and the smooth glass surface is measured in seconds. The higher the second, the better the smoothness of the plastic box. The better the smoothness of the plastic box, the more uniform and complete the contact between the surface of the material and the printing plate at the time of printing, the more sufficient the ink layer transfer on the layout (relief) or the blanket, and the better the coloring effect of the printed product.
2. The relationship between gloss and color rendering of plastic box
The gloss of the plastic box refers to the degree of specular reflection on the surface of the plastic box and is expressed as a percentage. The higher the gloss of the plastic box is, the more mirror-like the light reflected on the surface of the plastic box, the brighter the appearance characteristics. In fact, in addition to the specular reflection on the surface of the plastic box, there is diffuse reflection, which causes the gloss of the plastic box to decrease. High gloss plastic box raw materials, printing ink color is also more vivid, ink visual effect is also good. It can be said that the smoother the raw material of the plastic box, the higher the gloss and the higher the glossiness of the printed product.