In general, the thickness, density and distribution of the pores on the surface of the leather bag are the main basis for distinguishing between cow leather, pig leather, horse leather and sheep leather.
1. Pig leather: The pores on the surface of the leather are round and thick, and extend into the leather obliquely. The pores are arranged in three groups, and the leather surface has many small triangular patterns.
2. Horse leather: The pores on the surface of the leather are elliptical, slightly larger than the pores of the yellow cattle leather, and the arrangement is regular.
3.cattle leather: yellow cattle leather and buffalo leather are called cattle leather, but there are certain differences between the two. The pores on the surface of the yellow cattle leather are round and extend straight into the leather. The pores are tight and even, and the arrangement is irregular, like a starry sky. The pores on the surface of buffalo leather are thicker than that of yellow cattle leather. The number of pores is less than that of yellow cattle leather. The leather quality is slack, which is not as fine as the yellow cattle leather.
4. Sheepskin: The pores of the leather surface are oblate, the pores are clear, and several of them form a group, arranged in a fish scale.
5. Artificial leather and synthetic leather: Artificial leather and synthetic leather are composite materials made of textile or non-woven fabric as the base and synthetic resin. It is a kind of plastic product similar to natural leather. They are all soft, wear-resistant and elastic, and they are widely used. However, the gas permeability is poor, and the front side of the natural pores is not woven or non-woven, but not the animal skin. In addition, artificial leather and synthetic leather have poor cold resistance, and too cold will become hard and brittle.