Keep in mind that iStraight Keratin Diamond is more efficient and will last longer on deteriorated and porous hair types. Revives, repairs, moisturizes and protects degraded hair. Control hair growth and volume. Maintains silky hair and easy to arrange for up to 12 weeks.APPLICATION1. Shampoo with Clarifying Shampoo 2 times and rinse thoroughly. Let the foam act for 10 to 15 minutes. Do not use balm. Rinse, roast and dry 80% using medium heat. Shake the bottle well before use. Use protective gloves.2. Divide your hair into 4 sections with the paint brush, apply the iStraight Keratin System to each 1-1.5 cm root. Massage along each spit and remove excess product with a large comb.3. Leave to act for 30-40 minutes in a well-ventilated area and check that the hair is hydrated with the product.4. Dry the hair completely with the brush on medium heat. Using a ceramic plate that can reach 230 ° C (450 ° F), choose the thinner sutures, tamponate several times with the plate on the root, then slowly pass each thin spoon 4-7 times over its entire length . If the hair is discolored, fragile, thin or blond, the plate temperature may vary from 180 ° C to 210 ° C.5. Do not wash hair for 72 hours, avoid moisture and sweat. Until the first wash, the hair should be held straight, without clips and elastic. Do not put your hair behind your ears. If necessary, you can retrieve certain areas.Required quantity depending on length and width:Short hair: 30 / 50gAverage hair: 50 / 70gMedium / long hair: 70 / 100gLong hair: 100 / 150gExtra-long hair: 150 / 200gIndications: Avoid contact with eyes. If the solution comes in contact with your eyes, rinse with plenty of water. Strictly for external use. Avoid contact with the scalp, use gloves.Quantity: 473ml