Shimmer Lights Plex Lightener Violet plex lightener for anti-brass results Lifts up to 7 levels Dust-free powder formula On or off the scalp application For on-scalp application use up to 20 volume developer For off-scalp application use up to 40 volume developer for maximum lift 1:2 mix ratio For less breakage: after thoroughly rinsing lightener and before toning, apply Plex Treatment (step 2) to towel dried hair, leave on 10 minutes Shimmer Lights Lightening System Lifts up to 7 levels 97% less breakage Strengthens hair from the outside in Clear lift Cool blond results