Damp: Coated abrasives in the process of transportation and warehouse preservation, mainly to prevent the product from damp or soaking by rain, avoid adhesive and sand wet and affect the quality and safety of the product. Avoid method: take moistureproof, waterproof measures.

Loss and attenuation: there is a certain time difference between the production and use of coated abrasives, the longer the time, the greater the loss of the product. Avoid method: the warehouse must do first in first out.

Bending: there are creases or broken marks on the sand pieces, to avoid: storage should avoid heavy pressure.

Desanding: desanding phenomenon occurs in sand slices. Avoid: packaging, handling, storage of products in the process to be placed gently, to avoid damage.