Surface finishing is a kind of surface treatment technology that covers the surface of articles with paint, mainly to prevent the influence of the outside world on articles while beautifying, and improve the durability, that is, to beautify and protect the two main purposes. Compared with other surface technologies such as plating, glazing and enamel, painting has the most extensive application fields. [1]
The finishing solvents include water and organic solvents. Waterborne finishing materials are more and more used for leather finishing due to their low toxicity, high sanitary performance, low environmental pollution and other advantages. The finishing layers are generally divided into primer, middle layer, upper layer and top layer. The painting methods include wiping, brushing, drenching, spraying, etc.
