Three Points in the Irreplaceability of Self-adhesive Label Printing
Self-adhesive labels have a long history. However, with the passage of time, they are more and more widely used. Then, what is the irreplaceable advantage of self-adhesive labels? Why is it developing more and more rapidly?
Compared with the traditional label, self-adhesive label has the advantages of no brushing, no paste, no dipping, no pollution, saving labeling time and so on. It has a wide range of applications and is convenient and fast. All kinds of self-adhesive labels can be applied to materials that are not competent for general paper labels. It can be said that the adhesive label is a label, and the printing of the adhesive label is quite different from that of the traditional printing. Self-adhesive labels are usually printed and processed on the label linkage with multiple operation completed at one time, such as graphic printing, die cutting, waste removal, cutting and rewinding, etc. It can be seen that self-adhesive labels have higher requirements for printing process and printing equipment.
Adhesive label printing
Therefore, we should pay attention to several points when choosing self-adhesive labels:
1. The label should be smooth and the rewinding tension should be even. Conveying, running, aligning and winding can only be correct at good smoothness when printing. Rewinding tension of films should be uniform and appropriate. If the tension is too small, the film substrate will be loose, and the vertical and horizontal overprinting will not be accurate; if the tension is too large, the substrate shrinks horizontally, and the chromatography will be unstable, thus also difficult to print normally.
2. The thickness of the label should be uniform and the strength index should be qualified. The printing pressure imposed in the printing process is related to the thickness of the adhesive. If the thickness is uneven, then the printing pressure will also be uneven, which will lead to shallow or dark ink in label presswork. If the film strength is too weak, the tension of the film will be difficult to control during printing, which will have a great impact on die cutting and waste removal.
3. Overall consideration according to the type, grade, quality, characteristics of sticking surface, using environment and user’s requirements of sticking objects, etc. If the label made of transparent polypropylene self-adhesive label is affixed to the transparent bottle body, the label-free fashion sense can be produced, the grade of the goods can be improved, and the desire of consumers can be stimulated. While the flexibility, shrinkage, opacity, processing and labeling properties of PVC film are very good; and it can attract attention with bright colors and high contrast, which has the function of publicizing and promoting commodities.