1, back coating or back printing back coating is a protective coating on the back of the base paper to prevent waste discharge, after rewinding the label around the adhesive bond to the bottom paper. Another function is to make multiple layers of labels. The backprinting function is to print the manufacturer's registered trademark or pattern on the back of the backing paper, which plays the role of publicity and anti-counterfeiting.

2. Surface coating is used to change the surface characteristics of the surface material. For example, improve the surface tension, change the color, increase the protective layer, so that it can better accept ink and easy to print, to prevent dirt, increase the ink adhesion force and prevent the purpose of printing text and text shedding. Surface coating is mainly used for non-absorbent materials, such as aluminum foil, aluminized paper and various film materials.

3, the surface material is the surface material, is the front to accept the printing text, the back to accept the adhesive and finally applied to the material to be pasted. Generally speaking, all flexible deformable materials can be used as self-adhesive fabrics, such as commonly used paper, film, composite foil, all kinds of textiles, thin metal sheets and rubber, etc. The type of surface depends on the final application and printing process. The surface material should be able to adapt to printing and printing, have good inking, and have enough strength to accept a variety of processing, such as die cutting, waste discharge, slitting, punching and labeling.

4, adhesive adhesive is the medium between the label material and the bonding substrate, which plays the role of bonding. According to its characteristics can be divided into permanent and removable two kinds. It comes in a variety of formulations to suit different surfaces and different occasions. Adhesive is the most important component of self-adhesive material technology and the key of label application technology.

5, release coating (coated with silicon layer) that is, on the surface of the bottom paper coated with silicone oil layer, coated with silicone oil can make the bottom paper into a very low surface tension, very smooth surface, the role is to prevent the adhesive bond on the bottom paper.

6, the role of the bottom paper is to accept the release agent coating, protect the adhesive on the back of the surface material, support the surface material, so that it can be die-cutting, waste discharge and labeling on the labeling machine.7, the bottom coating is the same as the surface coating, but is coated on the back of the surface material, the main purpose of the bottom coating is:

(1) to protect the surface material, prevent the penetration of adhesive.

(2) Increase the lightlessness of the fabric;

(3) Increase the adhesive force between the same surface material;

(4) Prevent the plasticizer in the plastic surface material from penetrating into the adhesive, affecting the adhesive performance, resulting in the reduction of the adhesive force of the label and the label falling off.