1, leather: general are cattle, sheep, pigs, and other animals of the original skin, processed into all kinds of leather material. Dermal generally divided into head skin and second skin two kinds. Head skin is made with grain, cattle, sheep, pig skin and the skin direct is machined and become. All full grain can from pore weight and degree of density to distinguish belong to what animal leather. Second skin is original skin fiber in organization is loose second part, the chemical material spraying or facing in PVC, PU film is machined and become.

2, head skin and second skin: it is to observe the skin longitudinal section fiber density. Head skin by and tight and thin fiber layer and its close together a little loose excessive layer composed; Second skin is only loose fibrous tissue layer, after spraying chemical raw materials or polishing leather processing into popular leather.

3, bonded leather: animal scrap leather and leather leftovers after smashing, allocate chemical raw materials processing is made and be become. Its characteristic is hide edge is tidy, efficiency is high, the price is cheap; But skin body usually thicker, strength is poor. This is a small factory production embossed leather shoes main material.

4, artificial leather, artificial leather are divided into imitation leather (or rubber) and advanced PU two. Imitation leather or rubber, PVC and PU and artificial material body. It is in the textile cloth base or non-woven base, by all sorts of different formulation and foamed PVC and PU coated or processing is made and be become, the characteristic is various, waterproof properties is good, keep out appearance tidy, utilization rate is high, the relative price of genuine leather cheap characteristics. Senior PU, the surface technology extremely makings of fibrous tissue, almost reach dermal effect, its price and the domestic head layer of the skin of the same price.