“…Phase transition phenomena in potassium stearate-water-polyol systems have been previously studied by Tomomasa et al They confirmed that for polyols including glycerol , the transition temperature for the gel-isotropic solution or liquid crystal T c had a minimum as the polyol concentration increased 20 . The phase diagrams of the acid soap-water systems below T c , however, have not been systematically investigated because of the difficulty in obtaining measurements at the equilibrium state.…”