Includes a Sleek Tint Applicator Brush for easy and precise application and mixing. This generation’s ultimate color line, SPARKS Permanent Creme Color, consists of 86 rich shades with industry first technology for stronger hair and true to tone color. This range spans over eight different pure tonal families including cool toned Naturals and an ultra-cool, blue-green based Ash family that makes controlling unwanted warmth a snap! Formulated for the future, SPARKS Permanent Creme Colors replenishes hair lipids while binding color with the SPARKS Dual Action Color System. This advanced system uses two new technologies that work simultaneously during the color process. Color Binding Technology: Replenishes the cysteine levels Strengthens hair structure Fight the fade Smart Oleo System: Smooths hair surface Reinforcing color molecule chains Seals in Color How to Use: Mixing Ratio: 1 SPARKS Permanent Color : 1 SPARKS Developer Developer: 20 Volume Processing Time: 40 minutes For 50-100% grey coverage using SPARKS Permanent Creme Color mix 0.5 oz of either .0 (for cool shades) or .03 (for warm shades). All SPARKS Permanent Creme Color shades are intermixable. What else you need to know: Up to 100% gray coverage Flexible Reliable Long-lasting shine Vibrancy