1. The so-called "first look" means that we get a leather product, and first look at whether it has irregular lines, pores, luster and so on that the first layer of cowhide should have.
2. Although hard cowhide can't pinch the pores on the surface, it can still be seen clearly.
3. The gloss of the surface is not possessed by fake leather; Of course, sometimes the surface gloss of cowhide is not obvious, and the method of "kneading" is not applicable (of course, the pores are still very clear). We can take the method of "folding", and we can see fine irregular lines by gently folding an angle inward, while artificial leather or double-faced leather usually has no such wrinkles, but is very smooth.
5. It is best to see the cross section of the leather. The first layer of leather can clearly see the dense cross section structure, and the reverse side is generally rough.
6. "Smell" The smell of artificial leather has a pungent smell similar to that of plastic. The taste of genuine leather is quite special. We can get some real leather to smell first. Some people say it's a bad smell, others say it's fragrant. In fact, smelling different tastes is formed because everyone's taste system and taste consciousness are different. It can only be said that it is the delicate smell of genuine leather. But this is not absolute, because some bags will use some pungent glue, which will also affect the taste judgment.
Two. Here are a few examples that are not the top layer cowhide to distinguish:
1. This kind of leather obviously does not wrinkle when pressed. This is a coated fabric with two layers of cowhide.
2. Although the grain of this piece is very similar to litchi grain, and it seems to have pores, it is not the first layer because it has no wrinkles and the surface is not smooth when pressed.
3. Smooth surface, good brightness and no dermatoglyphics. The texture of the whole leather is the same. The leather is about 1 mm-5 mm thick, dyed and particularly black. The cross section of leather is not consistent with other accessories.
You can't see the cross section. Are not good top layer cowhide. This kind of skin is usually called two-layer skin or junk skin.
Dermal ≠ first layer cowhide
There are many kinds of genuine leather, including the following: the first layer of cowhide, the second layer of cowhide and the third layer. Furniture leather. Broken skin. Pinch the skin
Of these four kinds, the top layer of cowhide is the most expensive.
How to analyze whether it is the first floor, there are several points,
According to the classification of leather, there are two layers of leather. The first layer of leather includes grain leather, modified leather, embossed leather, special effect leather and embossed leather. Two-layer leather is divided into pig two-layer leather and cow two-layer leather.
Characteristics of two-layer cowhide: the reverse side is the second layer of cowhide material, and the surface is coated with a layer of PU resin, so it is also called coated cowhide. Its price is cheaper and its utilization rate is high. It is also made into various grades with the change of technology, and the surface of the second layer is much rougher than that of the first layer. Therefore, the surface coating in some brands of fitness belts is colored with this leather. Because of the resin and color, the average customer can't see the first floor and the second floor, and the first floor is expensive. So the cost is also saved, and it can be given to customers cheaply.
Third, furniture skin. Broken skin. Pinch the skin This is the principle that after the product is finished, there will be some leftover bits and pieces, and then it will be paddled and pressed into a whole piece of skin, just like making a paper paddle. How to distinguish? Because all kinds of colors are put together, there will be traces of colors or seams. Just like the joints of inferior paper we sometimes use, most of the broken skin is made into some cheap fitness belts or small things.
What does the first layer of cowhide mean?
"(1) genuine leather" is a common word in the leather products market, and it is a customary name to distinguish natural leather from synthetic leather. It is mainly made of animal skin. There are two kinds of dermis: the first layer and the second layer.
(2) Scalp is directly processed from raw skins of various animals, or the skins of animals such as cattle, pigs and horses with thick skins are cut into upper and lower layers, and the upper layer with tight fiber structure is processed into various scalp skins.
How to distinguish the first layer and the second layer of cowhide?
An effective way to distinguish the first skin from the second skin is to observe the fiber density in the longitudinal section of the skin. The top layer is composed of a dense and thin fiber layer and a slightly loose transition layer closely connected with it, which has good strength, elasticity and process plasticity. The second layer of leather has only a loose fibrous tissue layer, which can only be used to make leather products after spraying chemical raw materials or polishing. It maintains certain characteristics of natural elasticity and process plasticity, but its strength is poor, and ordinary products will wear or crack after 3-6 months of use.
Understanding of genuine leather A 5MM thick full-grain mixed cowhide can be divided into eight layers in handmade cowhide. The outermost layer is called scalp, which has the best texture, tensile strength and air permeability. Second, the second layer of leather needs to be polished before painting, but its elasticity is poor and it is easy to paint off. First, observe the longitudinal section, and the number of layers determines the quality. The top layer is a dense colored layer, the middle layer is a dense and thin fiber layer, and the lower layer is a slightly loose transition layer connected with the fiber layer. The first layer of leather has good strength, elasticity and process plasticity. Two-layer leather has only two layers-dense colored layer and loose transition layer, which maintains certain characteristics of natural elasticity and process plasticity, but its strength is poor. Second, smell close to the nose, and taste determines quality. The second skin often has a strong pungent smell. This is because there are chemical residues in the process of leather nitrification. The first layer of leather has only the faint fragrance of leather itself, and it will never make people have a headache. Third, cut a gap. The thickness of the outermost layer of cowhide is about 0.7MM, which can withstand 50 to 60 kilograms of tension and can be used for more than 3 years. The second layer of leather can only bear the tension of 15 to 20kg, and the leather surface will break in about one year. Cut a piece of real leather, cut a mouth with a width of 1 cm, and two hands can be pulled apart, which is the second skin; It's the first layer of skin that can't be torn off. Fourth, tensile strength, coloring determines the quality of the first layer of leather, and there will never be uneven leather surface, and there will be no uncolored areas when the leather surface is stretched hard. When the second skin is pulled open, you will see the white line because the color has not entered.
Just like 5 mm thick full grain cowhide, no matter what kind of cowhide is made, its service life is at least 50 years.