Leather Knowledge

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And the use of leather goods will help a lot.

The leather industry in the world includes leather, regenerated leather and artificial leather.

Leather is made from cattle, sheep, pigs, horses, deer or some other animals. After tanning, the leather is made of leather materials with various properties, strength, touch, color and pattern. It is a necessary material for modern leather products.

Among them, cowhide, sheepskin and pigskin are three kinds of leather materials used for leather making.

The dermis is divided into two types: head skin and two skin.

(1) the skin of the first layer is a cow, sheep, pig skin with grain, and there are natural scar and blood tendon marks on the surface. Occasionally there are knife injuries in the processing process and the very low belly parts. The imported head skin and cattle * number mark.

The whole grain of the skin can be distinguished from the animal skins from the size and density of the pores.

There are more kinds of cattle skin, such as cow skin, meat, 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 (Yin Hu skin, blue fox skin, etc.), wolf skin, dog skin, rabbit skin and so on are easy to identify, and can not be made of 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. Only after spraying chemical raw materials or polishing can it be used to make leather products. It maintains certain natural elasticity and process plasticity characteristics, but its strength is poor, its thickness is the same as that of the first layer skin, and there are various kinds of leather used for the current flow production, the leather surface processing technology is somewhat different, but the distinguishing method is the same.

The following is a detailed description of leather processed by leather.

1, water stained skin: refers to cattle, sheep, pigs, horses, deer and other head skin bleaching and dyeing all kinds of colors, up and down, and polishing processing of various soft skin.

2, open edge beads: also known as film leather, is thrown into two sides along the backbone, and to repair the wrinkled belly and some parts of the skin or two layers of open skin, on the surface of all kinds of pure color, metal color, pearl, color, or two colored or multicolored PVC film processing.

3, lacquer: leather made of two layers of leather, coated with various chemical raw materials, pressed or matted.

4, repair surface: it is a poor top layer of leather, polishing the surface, grinding the surface of the scar and blood tendon marks, with a variety of popular color paste spray, pressed into grain or smooth effect of the skin.

5, embossed leather: generally used to repair leather or open side beads to suppress all kinds of patterns or patterns.

For example, the crocodile pattern, the lizard pattern, the ostrich skin pattern, the python skin pattern, the water ripple, the beautiful bark pattern, the litchi pattern, the imitation deer pattern, and so on, and all kinds of stripes, flower patterns, stereoscopic patterns or creative patterns reflecting various brand images.

6, printed or burnt leather: the material is the same as the embossed leather, but the processing technology is different. It is printed or ironed into a variety of patterns or patterns of the first layer or two layers of leather.

7, frosted skin: the surface of the leather is polished, and the grain scar or rough fiber is worn out to reveal the smooth and smooth leather fabric. Then it is dyed into various popular colors.

8, anti velvet skin: also called "Pi Pi", is the surface of the skin is ground into velvet, and then stained with the popular colors of the first layer of skin.

9, laser skin: also known as laser skin, using laser technology to etch various leather patterns on leather surface.

10, regenerated skin: after crushing all kinds of animal skins and leather waste, chemical raw materials are processed and made.