Remove any earrings, wash well (with water) a centimetre of skin behind the ear. With a stick of wadding apply a small amount of product blended with oxidizer. Allow to dry and leave for 50 minutes without washing, covering or touching. After this period, rinse thoroughly. If during the 50 minutes the client shows itching, burning sensation or redness, rinse immediately with warm water and do not use the product. If, in the following 48 hours, you may have itching, burning or redness, do not use the product and consult a doctor. For professional use only.