Shake the booster and cover the neck of the ampoule with a tissue. With the free hand, take the ampoule at the place of the cervix and break it with a sharp movement at the level of the white ring.Apply before makeup. Whenever the make-up must hold perfectly for long hours (wedding, end-of-year celebrations, etc.), but also as often as necessary, when the face looks gray and looks stressed.On cleansed skin, pour the first half of the ampoule into the palm of your hand and apply it to the face, neck and décolleté; tap in. Apply the day cream adapted to the type of skin. Mix the second half of the ampoule with the foundation and apply immediately.