The rich and intensely nourishing emulsion contains keratin to fill in the structural gaps of the outer hair layer as well as the cortex. The pH 4.5 Balancer technology densifies the hair structure and locks in color pigments in the deepest layers of the hair; this improves the strength and elasticity of colored hair. The hair is brought to the optimal pH value of 4.5, ensuring that the color remains as vibrant until the next salon visit as it was on the first day. Application: Apply to towel-dried hair and work in. For different neutralization results, leave the treatment in the hair for varying lengths of time: • Light - 5 minutes • Medium - 7 minutes • Intense - 10 minutes, then rinse thoroughly.