I have to change my previous review! We bleached my hair using the Radical Bleach Kit with the cap, which worked wonderfully, and then applied the Tripped Up Turquoise all over my hair. We checked the color at 20 minutes since I have some gray hair and decided to leave the color on for another ten minutes. After rinsing and blow drying I can positively I will not be using BTZ again. The color not only didn't stick to the bleached parts but it's not even turquoise! I have light green and grayish blue on the small amount that did stick.