1. According to the type, grade and quality of the labeled object, the characteristics of the pasted surface, the operating environment and the requirements of the user, etc. If you want to use good transparency polypropylene sticker labels made of labels attached to the transparent bottle can produce no label fashion sense, can improve the level of goods, stimulate consumers' desire to buy. And PVC film flexibility, shrinkage, impervious to light, processing characteristics and labeling characteristics are very good, and bright colors, with the role of promotional goods.

2. film adhesive label surface must be smooth and dense, uniform density, color uniformity, good light transmission, to ensure that the film ink absorption uniformity, the same batch of printing color difference is small.

3. sticker thickness to uniform, strength index to qualified. In the process of printing the printing pressure is related to the adhesive thickness, if the thickness is not uniform, the printing pressure is not uniform, will lead to the label print ink or dark or light. If the film strength is too bad, the film tension in the printing process is difficult to control, will have a great impact on die-cutting and waste disposal.

4. sticker label to be flat, rewinding tension to be uniform. Good flatness, printing when the correct delivery, operation, registration and rewinding. Film rewinding tension should be uniform and appropriate, such as too small tension, film substrate relaxation, vertical and horizontal overprinter is not allowed; If the tension is too large, the substrate transverse contraction, color instability, it is difficult to normal printing.

5. film adhesive label also has the characteristics of corrosion resistance, aging resistance, color fastness, shrinkage, expansion ratio small. Such as poor corrosion resistance, easy aging, fading, the label made of not durable, but also affect the sales and use of goods. If the ratio of shrinkage and expansion is large, it will not only affect the printing overprinter accuracy, but also make the label in the process of using deformation, affecting the sales and use of goods. In particular, high-grade goods label, should try to avoid goods not expired, and the label has been aging embarrassing situation (label aging including plastic aging and ink fading and other reasons). When necessary, aging resistance test should be carried out on plastics or labels to test their performance.

6. choose a sticker also in the effective period, maintain good viscosity.