Create beautiful and vibrant shades with Matrix SoColor Pre-Bonded Blended Collection. Permanent colour range A blended coverage on 100% grey hair Up to 100% grey coverage on 50% grey hair Pre-bonded to protect the inner hair structure colour after colour Pre-blended to ensure all underlying pigments and warmth are neutralised Pre-paired with SoColor Sync tone-on-tone range for seamless results from root to tip Directions for use: 1:1 mixing ratio with Matrix Cream Developer in 10, 20, 30 or 40 volumes. Processing time of between 35-45 minutes depending on the case of hair.