Color Sync is the first ammonia-free cream color that heals hair. It contains a patented ceramide complex, which simultaneously cares for and regenerates hair their structure. Smoothes and strengthens hair, balances porosity. So the color is uniform and full of shine. Mix only with the Color Sync activator.Preparation: Wear suitable disposable gloves! Use only with recommended oxidants: 9vol (2.7%) or 20vol. (6%) maximum. Do not use with more than 20 volts of hydrogen peroxide (6%). Observe the stated mixing ratio! If you use a shaker to prepare the mixture, open it immediately after mixing ends, there is a risk of foaming of the product and damage and tearing containers.Mixing: Mix one part of Color Sync with the same part of standard Color Sync developers 2.7%. For example: 45ml Color Sync + 45ml standard Color Sync developer 2.7%.Application: Wear suitable disposable gloves! Do not use metal objects. Leave on at room temperature for 20 to 25 minutes as needed. Rinse hair thoroughly at the end of the application period.90 ml