How to use To begin with, open and unfold the Garnier Skin Active Pure Charcoal & Algae Face Sheet Mask. Then, apply it onto the cleansed skin of the face, with the protective film on top, and smooth it gently to ensure that it touches the skin. The following step is to peel off the protective film, and then guarantee it covers the entire face and adjust with the eye area as a reference. Allow it 15 minutes before removing the mask, carefully peeling it from the edges. Lastly, massage the excess product left on the skin until it absorbs. Single-use mask.