How To Distinguish Head Skin And Two Layers Of Skin

　　 Genuine leather Divided into head skin and Two layers of leather The two category.

(1) the skin of the first layer is a cattle, sheep and pig skin with grain. There are natural scar and blood tendon marks on the surface. Occasionally, there are knife injuries in the processing process and very low belly parts. The whole grain of the skin can be distinguished from the animal skins from the size and density of the pores.

　　 Cowhide There are many kinds, such as cow skin, meat and cattle hide, cattle hide, cow hide, Bull Hide, Uncastrated Bull Hide and castrated bull skin. There are also cattle hide, buffalo skin, yak skin and calf skin in China. Among them, the pores of the buffalo hide are thicker and thinner, while the yellow cattle hide is smaller and thicker than that of the buffalo hide.

The pores of sheep skin are thinner, denser and slightly skewness, mainly consisting of two main categories: sheep skin and goat skin. Pigskin's rule of long hair is a small number of 3~5 roots, so it is easy to distinguish. It is easy to distinguish. Pigskin is commonly used for raising pigs, and wild boar skins. The famous wild boar is wild boar. The boar skin has obvious porcine skin pores and grain characteristics. Because of its special collagen fiber structure, it can be made into very soft garment leather or glove leather, and its value is very high.

In addition, ostrich skin, crocodile skin, short nosed crocodile skin, lizard skin, snake skin, bullfrog skin, sea fish skin (shark skin, cod skin, fish skin, eel skin, pearl fish skin, etc.), freshwater fish skin (with grass carp, carp skin and other scaly skin), fur fur fox fur (silver fox fur, blue fox skin, etc.), wolf skin, dog skin, rabbit skin and so on are easy to identify, and can not make two layers of skin.

The skin of the first layer is made directly from the raw skins of various animals, or the skins of cattle, pigs, horses and other animal skins with thicker cortex are sliced and cut into two layers.

(2) the two layer skin is the two layer of loosely woven fibrous tissue. It is processed by chemical material spraying or covered with PVC and PU film.

Therefore, the effective way to distinguish the skin of the head and the two layer skin is to observe the fiber density of the longitudinal section of the skin. The skin of the first layer is composed of a dense thin fibrous layer and a slightly loose overlayer which is closely connected with it. It has good strength, elasticity and process plasticity. The two layer of leather is only a loose fibrous tissue layer. It can only be used for making leather products only after spraying chemical raw materials or polishing. It maintains certain natural elasticity and process plasticity, but its strength is poor, and its thickness is the same as that of the head skin.