1) Wash the hair twice with KC Clarifying Shampoo. Rinse well and towel dry. 2) Blow-dry hair with moderate heat. Blow dry. 3) Part hair. Apply KC BIO Treatment with a color brush section by section. Do not over saturate. Complete each section by combing root to tip to distribute the treatment evenly and ease any excess for the next section. Leave on for 15-20 minutes. 4) Standard blow-dry using medium heat. 5) Use flat iron with a maximum of 180-230 Celsius temperature. Start at the nape of the neck. Please use caution when working with thinner and lighter hair. 6) For the absolute best results: Wait for the hair to cool down after the final flat iron process and wash hair with KC Post Shampoo & Conditioner. Style.