Kenra Color Permanent Coloring Creme portfolio consists of gentle- low-ammonia color available in a wide array of multi-dimensional tones that deliver consistent- reliable results. Features Balancing Complex 5 Gentle- low ammonia formulation Full gray coverage up to 100% Provides vibrant- long lasting color results and color saturation Intense shine How To Use: Kenra Color Permanent Coloring Creme Developers were specially formulated for use with Kenra Color Permanent Coloring Cremes. Processing Time: 30 minutes standard- up to 40 minutes for gray coverage. Mixing Instructions: In a non-metallic bowl- mix one-part Kenra Color Permanent Coloring Creme with one-part Kenra Color Permanent Coloring Creme Developer (1:1). spray hair with Kenra Color Porosity Equalizing Spray and apply color. Process for 30 minutes/up to 40 minutes for gray coverage.