OSMO - Super Silver No Yellow Mask 1000ml An intensely hydrating, sulphate-free treatment mask infused with super violet pigments to replenish lost moisture and neutralize any yellow tones Leaves blonde, grey and bleached hair feeling nourished, healthy and more radiant Lose the brassy yellow and embrace silver and ash tones Ideal for use on super-lightened, grey or bleached hair Specially developed to reduce unwanted yellow tones and change the hair colour to silver/ash tones instead Perfect for use on natural and synthetic hair types and has been formulated with extreme, super-violet pigments to combat any unwanted brassy tones.