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. Plastic box printing features high gloss plastic box raw materials, printing ink color is 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. There is a close relationship between the glossiness and the smoothness of the plastic box material, but the glossiness is not smoothness. The shiny surface of the plastic box material is not necessarily a smooth surface. From the perspective of the glossiness of the raw material of the plastic box, it is of great practical significance to select suitable plastic box raw materials for printing according to the characteristics of the prints. Such as the text of the layout of the main text of the book, should choose the general paper gloss, so as not to reflect, so that the eyes do not look tired for a long time. The printing of the plate-based layout, should choose high gloss PVC, PET, PP material

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