Kenra 40 Volume Creme Developer Kenra Color Permanent Coloring Creme Developers were specially formulated for use with Kenra Color Permanent Coloring Cremes. Available in 10 volume (3%), 20 volume (6%), 30 volume (9%), and 40 volume (12%) strengths to ensure proper lift of natural hair and oxidation of dye intermediates. Creamy consistency allows for easy mixing and precise application for all your haircolor needs. How To Use: Mixing ratio: One-part Permanent Coloring Creme plus one-part Developer (1:1). Standard Processing Time: 30 minutes. Processing time for gray coverage: up to 40 minutes. Permanent Coloring Creme and Developer: Kenra Color Permanent Coloring Creme Developers were specially formulated for use with Kenra Color Permanent Coloring Cremes. Instructions: In a non-metallic bowl, mix one-part Kenra Color Permanent Coloring Creme with one-part Kenra Color Permanent Coloring Creme Developer 10-40 Volume (1:1). spray hair with Kenra Color Porosity Equalizing Spray and apply color. Process for 30 minutes/up to 45 minutes for gray coverage.
