Paraffin-water emulsions were prepared by using a phase transformation emulsification method. Span80 and Tween80 were used as the emulsifiers. Paraffin content up to 40% could be obtained by using such a method. The emulsions were characterized for their viscosity and latent heat by using the NDJ-1 viscometer and the Q10 differential scanning calorimeter(DSC), respectively. The results showed that uniform and stable paraffin wax emulsions could be obtained when the HLB of emulsifiers was about 10(i.e. the w...