(1) Using instant film as the cover can protect the paper. After laminating, the service life of the cover (or printed surface) can be extended, especially for students' textbooks, so the usage is increasing.

(2) Impressions are not easily damaged. After use, coating and laminating can increase the color effect and protect the printed images and texts, without causing them to be worn out. This is beneficial for publishing house art editors to create various art designs on the surface of the cover or print according to their needs, thus also promoting an increase in usage.

(3) Namely, the production of coating is highly profitable. The cost of film coating is low, easy to get started, and profitable for enterprises.

The above three points make the coating film "hot", but the quality issues and impact on the binding quality of the coating film are rarely taken seriously. The following will further analyze this.

The main problems with the cover and page after instant coating and lamination are:

Surface blistering, wrinkling, uneven bending, detachment, and difficulty in storage have not been solved for many years, and the reasons for these quality problems are also multifaceted, such as:

1. The impact of different types of paper.

2. The impact of different ink colors.

3. The impact of different climates.

4. The impact of environment and conditions.

5. The impact of the lack of scientific management in enterprises.

6. The impact of personnel quality.