Abstract: The refining process of raw lacquer was studied by utilizing zymological principle and rheological theory. The results show that system temperature, refining time and shearing strength have effect on rheological property:1)The longer the refining time, the higher is the lacquer viscosity; 2)Effect of temperature on rheological property is complicated. In low-temperature range(T <45.8℃), as temperature is increasing, fluidity of lacquer is also increasing, viscosity is decreasing. When tempera-ture is further increasing (T>51.3℃), viscosity begins to increase again. As temperature keeps on increasing, viscosity then begins to decrease. At 46.8℃, viscosity reaches its minimum value; 3)The change of viscosity of lacquer is also depended on agitation speed. At low speed, viscosity is increasing as stirring rate increasing. At the speed of 150 r/min, system reaches the minimum viscosity. Afterwards, viscosity is increasing with stirring speed increasing.

Key words: raw lacquer, rheological property, refining, biological conversion, supramolecular interaction