Water milk is to replenish moisture, and milk is to lock moisture and moisturize skin. Water emulsion is also called firming water, make-up water, etc. Some toners contain a small amount of alcohol, while others are pure plant formulas. The function of aqueous emulsion is to clean again to restore the pH value of the skin surface, adjust the stratum corneum, make the skin absorb better, and prepare for the use of skin care products. Using water emulsion after washing your face can replenish water quickly. Experts suggest using water emulsion for oily skin, water emulsion for healthy skin, water emulsion for softening skin for dry skin, water emulsion for T-zone firming skin for mixed skin and water emulsion for sensitive skin. Aqueous emulsion is a kind of liquid cream skin care product, which contains a lot of moisture, so it can provide moisture for the skin, and also contains a small amount of oil, which can play a role in moisturizing. However, if you want to make the emulsion play its greatest role, you must learn to use it correctly.