Notes on self-adhesive labels

⑴ According to the type, grade, quality of the labeling object, the characteristics of the pasting surface, the use environment, and the user's requirements, etc. If a label made of a polypropylene self-adhesive label with good transparency is used to stick it on the transparent bottle body, it can produce a fashionable feeling without label, which can improve the grade of the product and stimulate consumers' desire to buy. The flexibility, shrinkage, opacity, processing characteristics and labeling characteristics of PVC film are very good, and the color is bright, which has the function of promoting and promoting products.

(2) The surface of the film type self-adhesive label must be smooth and dense, with uniform density, consistent color and good light transmittance, so as to ensure the uniform ink absorption of the film and the small color difference of the same batch of printed products.

(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. If the film strength is too poor, the tension of the film during the printing process is difficult to control, which will have a great impact on die cutting and waste discharge.

⑷ The self-adhesive label should be flat, and the rewinding tension should be uniform. With good flatness, it can be conveyed, run, registered and rolled correctly during printing. The rewinding tension of the film should be uniform and appropriate. If the tension is too small, the film substrate will be slack, and the vertical and horizontal overprinting will be inaccurate; if the tension is too large, the substrate will shrink laterally, the color registration will be unstable, and it will be difficult to print normally.

⑸ Film self-adhesive labels should also have the characteristics of corrosion resistance, aging resistance, no fading, and small shrinkage and expansion ratio. Such as poor corrosion resistance, easy aging and fading, the label made is not durable, and it will also affect the sales and use of goods. If the shrinkage and expansion ratio is large, it will not only affect the overprinting accuracy during printing, but also deform the label during use, affecting the sales and use of the product. Especially for the labels of high-end products, try to avoid the embarrassing situation that the products have not expired, but the labels have been aging (label aging includes plastic aging and ink fading, etc.). When necessary, an aging resistance test should be carried out on the plastic or label to test its performance.

⑹ The purchased self-adhesive labels should also keep good stickiness within the validity period.