Hello, black-faced dolls are a common whitening method. Principle: Apply nano-toner to the face, let it penetrate into pores, and then use laser to blast the toner particles, and the dirt and cutin on the epidermis will be shattered; The generated high heat energy is transmitted to the dermis, which stimulates the renewal and vitality of skin cells, stimulates the repair of collagen fibers and elastic fibers, and uses the natural repair function of the body to start the orderly deposition and arrangement of new collagen, thus achieving the effects of shrinking pores, smoothing skin, whitening and rejuvenating skin and restoring the original elasticity of skin.