Problem: To provide a technique of simply and easily convert a powder makeup cosmetic such as powdery foundation or the like into a pickering-emulsificated liquid makeup cosmetic such as liquid foundation or the like. Means for Resolution: A solvent composition for use as a dispersion medium for converting a powder makeup cosmetic into a pickering-emulsificated liquid makeup cosmetic, which comprises (a) from 0.1 to 65% by mass of an aqueous component, and (b) from 35 to 99.9% by mass of one or more oily components selected from hydrocarbon oils and silicone oils.