Appearance and functional characteristics
Simple appearance
Both sides are gray, the surface is relatively rough and lacks decorative elements. Therefore, it rarely appears directly as an outer packaging but serves as an "inner framework" or "invisible support".
Strong load-bearing capacity
Due to its rigid structure, it can effectively bear and protect the internal products, especially suitable for packaging linings of goods with certain weights (such as wine bottles, electronic products, hardware components).
Stability and Hygroscopicity
It has good stability in a dry environment. However, as a paper material, it has a certain degree of hygroscopicity. In a humid environment, its strength will decrease and it may deform. Therefore, it is not suitable for products that will be in a high-humidity environment for a long time.