High-grade leather, such as Italian cattle and sheep skin, has no scar and high quality. Moreover, a major feature of Italian indoor farmed cowhide is that the leather surface is naturally disabled, with less scratches and thorns, and it is cleaner. Powerful processing technology, claiming that a piece of cowhide can be divided into 1 1 layers. The processing technology of raw materials is high. After slaughter, it is refrigerated with ice cubes and immediately sent to the processing site. There is no need to preserve hides with chemicals. Good processing technology, manual pickling or machine pickling. Compared with drum salinization and salt bath impregnation, this method has less mechanical effect on leather, less mechanical operation, less grain surface damage, cleaner grain surface and meat surface, and higher grade rate of blue wet leather and finished leather.