PVC, PTE, PP as the main raw material for printing, how its performance depends on the quality of printing ink. Only good properties of raw materials can obtain better color effect of printing. Therefore, a correct understanding of the relationship between the package performance and the color of the printed products is of great importance to improve the quality of products according to the characteristics of printing products and processing conditions.
The relationship between the smoothness of the packing box and the color rendering effect
Smoothness is packing box parameters to evaluate the degree of surface concavoconvex is physical quantities of packing box surface smooth and uniform degree, namely under the condition of certain vacuum, so that a certain volume of air, from the packaging test sample surface under certain pressure and the smooth flow of time needed for the glass table surface between the measure, expressed in seconds. The higher the number of seconds, the better the smoothness of the box. The better the smoothness of the box is, the more uniform and complete the contact between the paper surface and the printing plate when printing. The more ink transfer layer is on the letterpress or the rubber cloth, the better the printing effect is. On the contrary, the box smoothness is poor, uneven ink transfer, is not sufficient, and the paper face permeability of ink, color effect is also poor, tend to blur, hair color printing inks. Therefore, printing fine products, the smaller the mesh line and the smaller the dot diameter, the better the smoothness of the package should be printed, in order to make the manuscript reproducible.
Two. The relationship between the glossiness of the packing box and the color rendering effect
The glossiness of the packing box refers to the reflection degree of the mirror on the surface of the packing box, which is expressed as a percentage. The higher the glossiness of the box, the more reflective light that looks like a mirror on the surface, and the more it shows a bright appearance. In fact, in addition to the mirror reflection on the surface of the packing box, there is a diffuse reflection, which reduces the glossiness of the box. The packing box of high gloss, printing ink is bright, color or visual effect. It can be said that the smoother, the higher the gloss, the higher the gloss of the print color. The gloss and smoothness of the package are closely related, but the gloss is not smoothness, the glossy surface of the package is not necessarily the smooth surface. According to the glossiness of the box, it is of practical significance to select a suitable packing box for printing according to the characteristics of the printed piece. If the text is the main text of the text, it is suitable to choose the paper with glossiness, so as not to reflect, so that the eyes will not be tired for a long time. And to the printing plate layout, should choose high gloss PVC PTE PP, to make the printing ink evenly, thick, bright eye.