What is the function of membrane bubble brush? First, it can make up for the cleaning work that can't be completed after removing makeup and washing your face. Second, it can strengthen other maintenance functions, such as hydrating, whitening, soothing, adjusting the balance of water and oil, and deeply nourishing. The principle of the mask is to cover the face for a short time, temporarily isolate the outside air and pollution, raise the skin temperature, expand the skin pores, promote sweat gland secretion and metabolism, increase the skin oxygen content, and help the skin to eliminate the metabolites of epidermal cells and accumulated oil. Membrane separation is a new efficient separation, concentration, purification and purification technology with natural or synthetic polymer membrane as the medium and external energy or chemical potential difference as the driving force.