Hair Rebonding Shiseido Professional Crystallizing Hair Straightener (H1) + Neutralizing Emulsion (2) for Resistant to Natural HairPlease do not use if your hair has been previously bleached, color or chemically treated in the pass month. (recommend 1 month in between chemical treatments) Directions: H1 Straightener Coats the entire hair with N1 evenly, except for roots and let it set at room temperature for 10 to 20 minutes. After that, rinse it sufficiently with plain water, dry the hair and set with hot straightening iron at 180C 356F. When applying N1, keep 1~2 cm. above hair