Goldwell SilkLift High Performance Lightener 17.6oz High performance Lightener with Shield Technology. Gentle lifting of up to 5 levels, ammonia-free, for lighter bases and less resistant hair types. Use with SilkLift Conditioning Cream Developer Only. For on-scalp (maximum 6%/20 vol.) and off-scalp (maximum 9%/30 vol.) application. Adhere for instructions for use. Use 35mL SilkLift Conditioning Cream Developer (maximum 9%/30 vol.) with 1 scoop (25g.) powder. Do not use heat. Do not use on minors. Do not exceed 45 minutes processing time. Two versions tailored to all hair structures and lifting needs: - Strong lifting for up to 7 levels, for natural, color-treated, darker bases and more resistant hair types. - Gentle lifting for up to 5 levels, ammonia-free, for lighter bases and less resistant hair types. Both contain ShieldTechnology which creates a protective shield around the conditioning agents during oxidation to prevent damage.