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AboutZhongniu Group Co., Ltd. was established in May 2008 with a registered capital of 100 million RMB. Zhongniu Group is a large leather group that integrates the purchase and sale of yellow cowhide, blue wet leather, white wet leather, leather embryo, and finished leather production, processing, and sales. It has the right to self declare customs imports and exports and is one of the "Top Ten Leather Kings in China".
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A Comprehensive Guide to Leather: From Definition to the Diverse Categories of Finished Leather
Release time:2025-04-17
UV (ultraviolet curing) ink is a special type of ink that, under ultraviolet irradiation
UV (ultraviolet curing) ink is a special type of ink that, under ultraviolet irradiation, uses ultraviolet light of different wavelengths and energies to initiate the polymerization of monomers in the ink binder into polymers, thereby achieving ink film formation and drying. UV inks not only have vibrant colors (unless otherwise specified), but also exhibit good printability, suitable curing and drying speed, and excellent adhesion. In addition, it also has many characteristics such as wear resistance, corrosion resistance, and weather resistance, making this ink play an important role in the printing of leather products.
Leather is animal skin that has undergone physical and chemical processing such as hair removal and tanning. This material has high stability and durability. The unique grain layer on its surface gives it a natural grain and luster. At the same time, the tightly woven natural protein fiber network within its three-dimensional space makes the leather feel delicate and durable.
The difference between "rawhide" and "leather" lies in the fact that untreated rawhide becomes unusually hard after drying, while it softens and easily rots when immersed in water. However, after chemical tanning, the protein fibers in the rawhide will firmly bind with the tanning agent, transforming animal skin into leather that is soft, tough, and has many excellent properties. These properties include resistance to deformation when wet, resistance to shrinkage when dry, resistance to heat and moisture, resistance to chemical agents, as well as breathability, water vapor permeability, and anti-aging properties.
Rawhide refers to unprocessed skin directly removed from animals. Due to the lack of processing, rawhide has many problems, such as rough texture and easy decay. However, through a series of carefully designed processing techniques, rawhide can be transformed into leather, significantly improving its performance and quality. This leather is not only more suitable for use in the manufacture of various products, but also meets people's diverse needs in life and production.
These animal skins have unique properties and values. Cowhide, pigskin, and sheepskin account for up to 95% of leather products. Specifically, cowhide is known for its toughness and wear resistance, and is often used to make leather shoes, leather sofas, and other products that require durability; pigskin is favored for its good breathability and affordable price, and is often made into clothing linings; while sheepskin, with its soft and delicate texture, is often carefully made into high-end clothing and leather goods. At the same time, rare or precious materials such as snakeskin, horsehide, kangaroo skin, crocodile skin, and lizard skin are often used to create high-end luxury leather goods or products for special purposes.
The grain layer, also known as the epidermis, is the outermost layer of leather, composed of tightly arranged epidermal cells. It has excellent protective and waterproof functions. The reticular layer is located below the grain layer, composed of interwoven collagen and elastic fibers, providing the leather with the necessary flexibility and elasticity. The dermis, or tissue layer, is the core part of the leather, and the collagen fibers, elastic fibers, and matrix contained in it together give the leather great strength and durability. As for the muscle layer, although it is located below the tissue layer and is composed of muscle tissue, it is not closely related to the overall quality and performance of the leather.
Although different types of leather may have differences in microstructure, they all follow a similar four-layer structure. It is these unique structural characteristics that determine the physical and chemical properties of leather, and in turn affect the applicable range and processing methods of leather. Next, let's take a look at the main chemical components of leather. Protein is the core component of leather, with collagen accounting for the majority. It provides the necessary strength and toughness for leather. In addition, leather also contains a certain amount of water, fat, minerals, and tanning agents added during the tanning process. The proportion and properties of these components will be affected by the source and processing methods of the leather.
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Zhongniu Group is a large-scale leather conglomerate integrating the purchase & sale of yellow cattle hides, as well as the production, processing, and sales of wet-blue, wet-white, crust leather, and finished leather.
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