Redken's color extend blondage express anti brass mask is an ultra pigmented purple hair mask for blonde hair that ensures brighter, cooler blonde hair colour. Featuring a powerful toning formula, this hair mask helps to correct and neutralise unwanted yellow and orange undertones in even the brassiest blondes. To use after shampooing, towel dry hair. Wearing gloves, apply mask to hair, avoiding scalp area. Comb through for even distribution. Leave on for 5 10 mins, depending on desired neutralisation. 5 mins for subtle neutralisation, 10 mins for maximum neutralisation. Rinse thoroughly. In case of contact with eyes, rinse immediately.