The multi-layer label, originally named Fix-A-Form, was developed by Danny Boros in the UK. This solution was developed to address the problem for Bayer pesticides: users often forgot to bring instruction manuals, and ordinary self-adhesive labels could not carry the large amount of product information. The solution combined self-adhesive labels with multi-layer booklets. This solution was later introduced into the pharmaceutical industry. Its core advantage lies in increasing information capacity by adding layers without increasing the label surface area, making it convenient for patients to carry and read. A survey from the UK showed that after changing ordinary instruction manuals to multi-layer labels affixed to medicine bottles, approximately 35% of respondents indicated they were willing to read and change their habit of keeping instruction manuals. A report from the United Health Foundation in the UK indicated that approximately 25% of hospital admissions for the elderly were due to incorrect use of prescription drugs. Currently, the application of multi-layer labels in my country's pharmaceutical industry is in the market introduction phase, with some companies having concerns about packaging modification procedures and labeling processes. The advantages of novel design, large information capacity, and good shelf appeal can offset the initial costs, and multi-layer labels are compatible with all currently available automatic self-adhesive labeling equipment.
① Double-layer backing paper label. Special materials with a face stock and a double-layered backing paper. The first backing paper is glued to the second backing paper on the back. During die-cutting after printing on the face stock, the first backing paper is cut through and discarded together. When applying the label, the face stock and the first backing paper are peeled off together and affixed to the product. If needed, the label is peeled off again (leaving the first backing paper) and affixed to the relevant item.
② Double-sided paper labels. These are materials that undergo a two-stage coating process. The process is as follows:
a. Printing graphics on ordinary self-adhesive material.
b. Coating the face stock with silicone oil to create a silicone-coated backing paper with graphics.
c. Coating this backing paper with self-adhesive again to create a double-sided paper label material.
d. During re-printing and die-cutting, the second backing paper is cut through and discarded together, resulting in a double-sided paper label.
The usage of double-sided paper labels is basically the same as that of double-sided backing paper. Double-sided labels can be processed separately on printing and coating machines. It can also be processed in one step on specialized equipment.
③ Multi-layer labels are printed and processed on a high-end multi-functional rotary label press. The basic principle is as follows:
a. Two rolls of paper are printed simultaneously on two sets of printing devices.
b. Of the two rolls of material, one is self-adhesive, and the other is usually a thin paper material. After printing, the thin material is folded, partially glued, and finally bonded to the self-adhesive material.
c. The composite material is then die-cut, waste is removed, and it is rewound or cut into sheets to become multi-layer paper labels.