Directions: On-Scalp Usage: Use up to 20vol Developer for standard lift is recommended. Off-Scalp Usage: Use up to 40vol developer for maximum lift. Mixing and Application: Mix 1 part Shimmer Lights Plex Lightener with 2 parts Developer. Apply to dry hair. Process up to 50 minutes, checking every 10 minutes for desired lightness. Do not use heat. Rinse thoroughly with cool water, removing all traces of Lightener. DO NOT SHAMPOO. Follow with Shimmer Lights Plex Treatment (Nº 2). After Nº 2, rinse thoroughly, shampoo and condition. Then proceed with your favorite Shimmer Lights Toner.

What's in the box
1x Clairol Professional Shimmer Lights Plex Lightener 227g