Kenra Color by Kenra Professional Permament Creme Developer 10 Volume features Balancing Complex 5. Permanent Creme Developer is available in 10V (3%), 20V (6%), 30V (9%), and 40V (12%) strengths. It's stabilized at each dedicated volume to ensure proper lift of natural hair oxidation of dye intermediates. Specially formulated for use with Kenra Color Permanent Coloring Creme to provide consistent, reliable results on every client, every time. The creamy consistency allows for easy mixing and precise application.