First layer cowhide

< , - < - We usually use the four-step method of one look, two touches, three pinches, and four smells to identify whether the above leather is first-layer cowhide.


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Step 1: Look
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This is a piece of first-layer cowhide, but the texture will be different. The texture on the left is larger, while the one on the right is relatively smaller. That is because the skin of the cow is different in different parts. It's different, the texture is different, the texture is different. There are also tiny pores on it.


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Of course, you can see that the cross section of the leather is the best, the first layer of leather It is obvious to see the compact cross-sectional arrangement, and the reverse side is usually rough.


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Step 2: Touch the surface of the
dermis and stroke the back with your fingers. The feeling is very smooth, while the non-dermal surface usually feels astringent when touched, which is not cost-effective and has poor ductility. (We are talking about soft cowhide. Hard cowhide requires other tests, because hard cowhide is tough rather than elastic. Of course, the first step is still applicable).

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Step 3: Knead
The ductility of the first-layer cowhide is very good. A long piece of first-layer cowhide can be pulled to the end with just one pull, and the pulling rate can reach ..

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Because the real leather is elastic, if you press it slightly with your hand, there will be some swelling around the surface. Centripetal wrinkles are wrinkled, and irregular natural wrinkles can be seen even with a slight fold.


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Step 4: Smell
The smell of artificial leather is similar to plastic Pungent smell. The smell of genuine leather is quite special. We can first get some genuine leather and smell it. Some people say it is a peculiar smell, while others say it is a delicate fragrance. In fact, the different smells are caused by the differences in everyone's taste system and their understanding of taste. Let's say it is a subtle fragrance of genuine leather.

< , - < - The skin can be divided into top layer of skin and second layer of skin.
The first layer of leather is the skin of cows, with grained cow, sheep, pig skins, etc. The leather surface has natural scars and blood tendon marks, and occasionally there are knife wounds during the processing and extremely high utilization rate. The low belly part, the imported first-layer leather and the cow's serial number are branded. Full-grain leather can be distinguished from the type of animal leather by the thickness and density of pores. There are many types of cowhide, such as cowhide, beef cowhide, grazing cowhide, cowhide, bullhide, uncastrated bullhide and castrated bullhide. In our country, there are also yellow cowhide, buffalohide, yakhide and yakhide. Among them, the pores of buffalo leather are thicker and sparse, while the pores of yellow cowhide are finer and denser than those of buffalo leather. The pores of sheepskin are finer, denser and slightly sloped. There are two main categories: sheepskin and goatskin. Pig skins are easy to distinguish because their hair is distributed in three to a handful. Generally, artificially raised pig skins and wild boar skins are used. The most famous one is the South American wild boar. This kind of wild boar skin has a more obvious pig skin. The pores and grain characteristics of the leather, due to its special collagen fiber structure, can be processed into very soft clothing leather or glove leather, which is of high value. In addition, ostrich skin, crocodile skin, short-nosed crocodile skin, lizard skin, snake skin, bullfrog skin, seawater fish skin (including shark skin, cod skin, eel skin, eel skin, pearl fish skin, etc.), freshwater fish skin ( There are scaly fish skins such as grass carp and carp skins), furry fox skins (silver fox skins, blue fox skins, etc.), wolf skins, dog skins, rabbit skins, etc. are easy to identify.
The first layer of skin is directly processed from the raw hides of various animals, or the thicker skins of cows, pigs, horses and other animal skins are depilated and cut into upper and lower layers crosswise, and the upper part with tight fibrous tissue is processed Into various types of scalp skin. Shredded leather is also the top layer of leather. It is the leftover material from the entire top layer of cowhide. This material is used to manufacture low-end leather products. After it is manufactured, there may be slight differences in the thickness of the left and right skin lines. However, it is top layer of leather after all. There will be no peeling or peeling.
Second-layer cowhide is the second layer of the upper and lower layers of thicker cowhide that are cross-cut and re-bonded with materials attached to the surface. It is suitable for making mid-range leather products. It looks very classy and has a good appearance. There is no difference from the top layer of skin.