During the subsequent swelling phase of limed pelt, using DESOAGEN POU——a special eco-friendly and highly efficient swelling agent, that facilitates the sufficient, uniform and mild swelling of pelt. On the premise of reducing lime pollution, to get finer wet blue with less difference in the parts of the hide, higher yield of usable area and better physical property can be achieved In conclusion, in the Efficiency-Balance system, the efficiency - controlling - efficency combination of the three products facilitates the achieving of the production of high quality limed pelt, and thereby builds a solid foundation for the making of fine wet blue leather.