Moisturizing lotion has a good moisturizer effect and humidity, can keep the skin moist. Early emulsion is water package oil emulsion, more use of potassium soap emulsifier, but in the storage process will thicken, not easy to pour out from the bottle, in recent years, 12 ethanol amine sulfate or nonionic emulsifier, can be produced a good stability of the emulsion. Moisturizing lotion has a certain fluidity, shape quite like honey, hence the name. Emulsion contains a large amount of water, can fully replenish the skin moisture. Emulsion also contains a small amount of oil, can moisturize the skin. Emulsion has three aspects of the role, decontamination, water replenishment, supplementary nutrition.