A commercial acrylic emulsion paint with added ethanol was prepared as a model paint with two volatile components. A convective batch-drying experiment of the model paint coated on an iron plate base was performed, and the temperature and weight changes of the coat were measured simultaneously. Basic equations of the temperature-change method derived for the volatile single-component system proposed previously by the authors were extended to give equations for two volatile components. Drying rates of water and ethanol of the coated model paint were successfully obtained by substitution of the temperature and weight changes of the coat into the extended equations.