L'ANZA PROFESSIONAL Healing Color Translucent Color Catalyst neutralizes the ammonia of permanent color molecules and acidifies the formula, which allows for slight color pigment penetration into the cortex and beautiful translucent results.It heals, seals & protects through exclusive Color Attachment Technology, infusing hair with rich, long-lasting color. This exclusive technology includes: Keratin Healing System: delivers and locks micro-pigments deep into hair structure, generating true-to-tone, vivid color with brilliant shine. Flower Shield Complex: delivers full spectrum color protection, with anti-fade compounds for lasting vibrancy.