This Activating Emulsion from L'Oreal Professional's Diactivateur line is formulated to work specifically with Dia Light and Dia Sheer hair color ranges, ensuring optimal color deposit and longevity. Used for professional application, this 15 Volume (45) oxidant is essential for achieving consistent and predictable results when refreshing or coloring hair with the Dia system. It features a creamy texture for easy mixing and application. It is the crucial component that activates the oxidative process in the permanent or demi-permanent hair dye formulations, making it perfect for professional hair coloring services.