1, cleanliness, refers to the cleanliness and cleanliness of the surface. Because the production environment of off-type paper manufacturers is not the same, most of them are not dust-free studios. Due to cost problems, dust-free studios can not be used. Generally speaking, it is an ordinary factory building., A little better will lead to many improvements in the environment and the environment, which will have an impact on cleanliness.

2, off-type, refers to the off-type of off-type paper, there is no absolute value at this point, see each manufacturer's formula to determine.

3，Extraction force refers to whether it is easy when the product is torn off. Of course, there are strict test standards.