How should the mask be applied according to the card? — SUNGIT Hair Mask Intensive Keratin 220ml

According to the card, the mask is applied evenly to damp clean hair and scalp, left for 1–3 minutes and rinsed off thoroughly with warm water. The card does not state the amount of the mask, how often to use it or when results appear.

General information (not a manufacturer's instruction): avoid contact with the eyes; if the scalp itches or becomes irritated, stop using it.