1. The most production, the most widely used leather material quality is of course cowhide. Cowhide is the most durable, 2-3 years old cattle cowhide is the best, other such as Pigskin, goatskin, snakeskin, crocodile skin and so on are also very durable.
2. In general, when we open the bag when the first check is the box mouth, we choose when we must pay attention to do not choose those box mouth can not be very good match, and open and close should be flexible, the box of various parts of the adhesion should also be strong enough, textile fabrics can not appear jumping wire or crack the situation.
3. Hot pressing process is a low cost and fast method to obtain parallel replication structure at micro-nanometer scale, which requires only one mold, and the identical structure can be copied to the large surface on demand. The process is divided into die preparation, imprint process and graphic transfer.