I used Olaplex with Redken's Flashlift lightener, 30 vol. for zones 2 & 3 (mid lengths and ends) and 20 vol. for zone 1 (root area). Once target depth was achieved, I rinsed off the lightener and used Redken's Shades EQ to tone, using a formula of 50ml Clear, 15ml 9V, 10ml 9N and 5ml 9B for a clean, icy finish. I watched the toner closely for 20 minutes before rinsing and treating the hair with Olaplex No. 2.