Precautions for using self-adhesive labels

1. Based on the type, grade, quality, surface characteristics, use environment and user requirements of the labeling object, if the label made of polypropylene self-adhesive label with good transparency is pasted on the transparent bottle, it can produce a fashionable feeling without label, improve the grade of the product and stimulate consumers' desire to buy. The flexibility, shrinkage, opacity, processing characteristics and labeling characteristics of polyvinyl chloride film are very good, and the color is bright, which has the function of promoting and selling products.

2. The surface of film-type self-adhesive labels must be smooth and dense, with uniform density, consistent color and good light transmittance to ensure that the film absorbs ink evenly and the color difference of the same batch of printed products is small.

3. The thickness of the self-adhesive label should be uniform, and the strength index should be qualified. The printing pressure applied during the printing process is related to the thickness of the self-adhesive label. If the thickness is uneven, the printing pressure will also be uneven, which will cause the handwriting or ink color of the label printing to be dark or light. If the film strength is too poor, the tension of the film will be difficult to control during the printing process, which will have a great impact on die-cutting and waste discharge.

4. The self-adhesive label should be flatter, the rewinding tension should be uniform, and the flatness should be good, so that it can be correctly transported, run, registered and rewound during printing. The rewinding tension of the film should be uniform and appropriate. If the tension is too small, the film substrate will be loose, and the vertical and horizontal registration will be inaccurate. If the tension is too large, the substrate will shrink horizontally, the color registration will be unstable, and it will be difficult to print normally.

5. Film-type self-adhesive labels must also have the characteristics of corrosion resistance, aging resistance, non-fading, and small shrinkage and expansion ratio. If the corrosion resistance is poor, easy to age and fade, the labels made will not be durable and will also affect the sales and use of the goods. If the shrinkage and expansion ratio is large, it will not only affect the overprint accuracy during printing, but also cause the label to deform during use, affecting the sales and use of the goods.

Especially for labels of high-end goods, we should try to avoid the embarrassing situation that the goods are not expired but the labels are aged (label aging includes reasons such as plastic aging and ink fading). If necessary, we should conduct aging resistance tests on plastics or labels to test their performance.

6. The self-adhesive labels you purchase must also be within their validity period and maintain good stickiness.