Violet Crush for Blondes Purple Mask utilizes a proprietary/patent-pending colorant penetration technology to deliver cool, ashy tones to the hair, for all over color-deposition and toning, in 1 minute. Through our proprietary penetration technology and unique blend of Blue and Violet dyes, Violet Crush for Blondes Purple Toning Mask delivers even, perfect toning, knocking out even the most stubborn yellow and orange brass.