The biggest function of lotion is to moisturize and moisturize.
Simply put, the emulsion can be divided into two formulations: oil-in-water and water-in-oil. The former is easily absorbed and is relatively refreshing, while the water-in-oil type is not easy to absorb, and it will feel greasy when applied. To identify emulsions, all you need is a glass of water. First take a fingertip-sized lotion and put it into the water. Usually the oil-in-water type will float on the water surface, and will slowly dissolve after a little stirring, and become milky white; while most of the water-in-oil type lotion will sink below the water surface and Does not dissolve easily in water.