YIJIALIN has always been made of full grain leather, which is the most precious and durable part of the little bull´s body. Soaking, lime soaking, meat removal, and splitting enable leather to fully absorb tanning materials, and this combination of chemical and mechanical action organically stabilizes the skin.

After carefully selecting the leather embryo, it is time to re tanning. By using tanning solution, alum, and salt to induce physical and chemical reactions, collagen structure is increased and the stability of shrinkage, temperature, and moisture resistance is improved; Dyeing raw leather with aniline through soaking and mechanical action to enhance its elasticity, softness, and tear resistance; After oiling leather, it softens the feel of the leather and presents more or less distinct textures on the surface; Pre drying and drying can eliminate moisture in leather, air drying completes the process, and softens the leather during the filling process, giving it a unique touch.

The sorting process is a combination of chemical and mechanical actions to achieve uniform color and protect the outer layer. This stage only involves coloring and semi aniline leather, aiming to improve technical performance and final appearance. The protection provided by spray or hand can have different ingredients: coloring, transparency, oil and wax, each of which gives each series a special aesthetic appearance.