Product Description DIActivateur Developer 15-Volume is fully stabilized and buffered to ensure consistent and uniform color results. It’s creamy, rich formulas offer gentle controlled lightening and coloring action. This developer pairs withDIA RichesseandDIA Richesse Hi-Visibility. DIActivateur Developer 15-Volume is great for color treated hair and sensitized hair; for more luminous color; for corrective color/pre-coloration; for permed, smoothed, or straightened hair; and for refreshing and toning highlights. MIXING RATIO 1 : 1.5