Rusk Zero Lift Shine Enhancing Cream Developer in the 33.8 fl.oz size is a hair coloring product specifically formulated to enhance shine without lifting the natural hair color. Unlike traditional developers that contain peroxide to lift or lighten hair, this zero lift developer is designed to deposit color or tone without altering the natural hair color level. This developer is typically used with demi-permanent or semi-permanent hair color formulas to refresh or enhance existing hair color, add shine, or tone the hair. It works by activating the color molecules in the hair color product without causing any lightening or lifting of the natural hair color. Users can mix this zero lift developer with their chosen hair color or toner, following the instructions provided with the specific hair coloring product. Its creamy consistency ensures easy mixing and application, resulting in smooth and uniform coverage. The 33.8 fl.oz size provides a large quantity of product, making it suitable for professional use or for individuals who frequently color their hair and require a larger volume of developer.