ColorInsider precision permanent hair color maximizes high-definition color results with minimum stress to the hair’s cuticle for outstanding shine. High resolution color Perfectly-polished finish Precision-calibrated palette No ammonia, no odor ColorInsider Color MUST be mixed with the dedicated ColorInsider Oil-Cream Developer. As the developer and color have been specifically formulated to work together, ColorInsider will not perform as expected with another developer. How to use: -1:1 Mixing Ratio. 35 minute processing time -Use only with dedicated COLORINSIDER Oil-Cream Developers.