| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition not losing the sense of transparency at a normal temperature or even by preservation in cold storage, having excellent stability, by making the refractive index of a water phase coincident with that of an oil phase and adjusting the difference in refractive index between the water phase and the oil phase to a specific value or lower than it. SOLUTION: The difference in refractive index between a water phase and an oil phase is roughly preadjusted and both the phases are mixed and emulsified to prepare an emulsion. Then water is removed from an emulsion composition or wafer or a hydrophilic substance is added to the emulsion composition so that the refractive index of the water phase is adjusted, the refractive index of the water phase is made coincident with that of the oil phase at the same temperature in the range of 10-20 deg.C and the difference in refractive index between the water phase and the oil phase is adjusted to <=0.010, preferably <=0.005 to give the objective composition. |
