The cowhide can be divided into multiple layers (up to 8 layers). The outermost layer is the first layer of leather, which has the best quality, followed by the second layer of leather. Its strength, elasticity and air permeability are not as good as the first layer of leather. The car seat must use the first layer of leather. A kind of composite leather on the market now has a layer of glue on the surface of the second layer of leather. The surface is exquisite and looks a lot like the first layer of leather. Some merchants use this to pretend to be the first layer of leather to deceive users and should pay attention to identification.

From a professional point of view, the identification of leather should be judged from the odor, specific gravity, light resistance, migration resistance, fogging, thermal yellowing, and friction resistance of automobile leather. Since most car owners do not have professional knowledge in this area, it is difficult to judge, so the following simple methods may be used for identification.
1. Volume labeling method

The leather of the original factory will be marked with the date of manufacture, the name and area of ​​the leather factory, etc. on the back. Of course, the manufacturing date should not be too long, and the leather that is more than 3 years old should be noted for mildew.
2. Olfactory method

Good leather should not have a pungent smell after treatment, so too much solvent and paint smell is bad.
3. Heat resistance method

It is best to ask the manufacturer for a small piece of leather, and touch the sample with a cigarette butt for about 2~3s to avoid buying artificial leather products; burning with a lighter will take longer because of the large contact area.
4. How to watch

Under a magnifying glass of 30 times, it can be seen that the leather is like the surface of the earth, with pits and holes, and its air permeability is good. Automobile leather needs special treatment such as abrasion resistance and light resistance, and the pores will be covered.
5. Cutting method

Cut the leather horizontally with a blade. The color of the leather must be the same from the outer surface to the inner layer (black on the outside and dark gray on the inside are normal). Pay attention to whether there are different colors under the outer surface layer, and avoid buying second-hand leather that has been dyed or changed color.
6. Wipe method

Wipe the surface of the leather with a scouring oil, pay attention to whether there is any fading or shedding, so as to avoid buying secondary color-changing leather.
7. Law of Origin

All countries in the world produce leather, but the leather industry in Europe (Northern Europe, Italy, Austria, Germany, etc.) has a long history. Naturally, its leather processing level is much higher than that of low-end Southeast Asian leather.
8. Document Law

The leather in the factory has a clear source, place of origin, trademark, leather measurement items, and leather use authorization letter and other basic information.
9. Guarantee Law

This is the easiest way. When buying leather chairs, don’t forget to ask the store if they have a guaranteed service card. First, avoid buying low-quality leather, second, develop a regular maintenance habit, and third, provide permanent after-sales maintenance services. , Can be described as the benefits of three birds with one stone.