PVC, PTE, PP as the main raw material of printing, how about the performance of it, and determines the quality of the printing ink. The raw material only good performance, good print color effect can be attained. Therefore, correct understanding of performance and the relationship between the print color folding box, according to characteristics of printing products, process conditions, reasonable choose transparent folding boxes for printing, have important practical significance to improve the quality of products.

A, folding boxes, smoothness and the relationship between color effect

Smoothness is packing box surface concave and convex degree of technical indicators, evaluation is said box surface level off, smooth and uniform degree of physical quantities, namely, under the certain condition of vacuum, a certain volume of air, from the box under certain pressure between the test sample surface and the smooth glass surface flow through the time required to measure, its unit in seconds. The higher the number of seconds the smoothness of box, the better. Packing box smoothness, the better, when the printed paper and printing plate between contact, also is more uniform and complete, layout (relief) or the ink on the rubber cloth layer transfer are more fully, print color effects. On the other hand, the smoothness of poor packing box, ink transfer uneven, inadequate, in the face of permeability is strong, the amount of ink and paper color effect is bad, often easy to make print inky hair flower, hair light. So, printing fine products, cables, the thin, the smaller the dot diameter, the more smoothness good packaging printing, should be adopted so that the original good reproducibility.

Second, the relationship between color box luster and color effect

Color box glossiness is refers to the degree of specular reflection on the surface of the box, expressed in percentage. The higher the gloss color box, its surface can reflect light like a mirror, can show the appearance of bright characteristics. In fact, color box surface besides mirror reflection, there are diffuse, decreased gloss box. The high gloss packing box, print ink is more bright-coloured, inky visual effect. Box, as it were, the more smooth and luster also is higher, the higher the print colour gloss also. Packing box gloss and smoothness have close relations, but not smoothness, glossiness, packing box, shiny surface is not necessarily a smooth surface. From the perspective of the gloss characteristics of box, select the appropriate boxes for printing based on the characteristics of calendar, is of great practical significance. Such as the layout is given priority to with text books and periodicals, appropriate chooses gloss paper, in order to avoid reflection, make the eyes look also for a long time not get tired. And printing is given priority to with chart layout, appropriate chooses high gloss PVC PTE PP, make print ink evenly, thick, bright and pleasing to the eye.