1, according to the type, grade, quality, the characteristics of the paste surface, the use environment and the user's requirements, etc.. If the label made of transparent polypropylene adhesive labels is affixed to the transparent bottle body, it can create a fashion feeling without labels, which can improve the grade of the product and stimulate consumers 'desire to purchase. The film's flexibility, shrinkage, opacity, processing characteristics and labelling characteristics are very good, and bright colors, with the role of promoting promotional products.

2，the surface of thin film adhesive label must be smooth and dense, uniform density, consistent color, and good light transmission, to ensure that the film is evenly absorbed and the color difference of the same batch product is small.

3, the thickness of the adhesive label should be uniform, strength indicators should be qualified. The printing pressure applied during the printing process is related to the thickness of the adhesive. If the thickness is uneven, the printing pressure is also uneven, resulting in deep and shallow handwriting or ink color of the label print. If the film strength is poor, the tension of the film during the printing process is difficult to control, which will have a great impact on the die cutting and waste disposal.

4, not dry glue label to level a few, rewinding tension to be uniform. Good smoothness, printing can be correctly transported, run, alignment and roll collection. The rewinding tension of the film should be uniform and appropriate, such as the tension is too small, the film substrate is loose, and the vertical and horizontal overlay is not accurate; If the tension is too large, the substrate horizontal contraction, the color is unstable, and it is difficult to print normally.

5, membrane adhesive labels also have corrosion resistance, aging resistance, no fade, shrinkage, expansion ratio of small characteristics. If the corrosion resistance is poor, easy to age, faded, the resulting label is not durable, but also affects the sale and use of goods. If the ratio of shrinkage and expansion is large, it will not only affect the accuracy of the overprint during printing, but also cause the label to deform during use, affecting the sale and use of goods. In particular, the label of high-end goods should try to avoid the product has not expired, and the label has been aging embarrassing situation(label aging includes aging of plastics and ink decoloration, etc.). If necessary, aging resistance tests should be carried out on plastics or labels to test their performance.

6, buy the adhesive label must also be valid, to maintain a good sticky.