It says to leave it on for 5 minutes but because it was being applied too thick long hair, it was left on for 10 minutes. Dark Envy Red Neutralization Hair Mask uses a combo of blue-green direct dyes to help to send those red undertones packing in between salon visits. Stay cool-toned, calm, and collected with this green color-depositing hair mask from Matrix Total Results. MATRIX Total Results Dark Envy Red Neutralization Toning Hair Mask | For Red Undertones in Dark Brown or Black Hair | Cool, Glossy Finish| 6.8 Fl. 3.8 out of 5 stars 190 $24.00 Oz. Matrix Dark Envy Red Neutralization Toning Hair Mask is a must to pair with the depositing shampoo. Enrich dark bases with Dark Envy - Our first range that neutralizes red undertones in virgin and all-over black to dark brown hair color. Results can be visible in up to five minutes and it provides deep hydration and nutrition to dark hair. The mask can be used on natural hair that has been oxidized by heat, UV exposure or chlorine, as well as color-treated hair. Matrix Total Results Dark Envy Color Obsessed Mask is an in-salon and at-home blue-green pigmented mask that provides instant neutralization of red undertones. Applying the toning hair mask after shampooing but make sure to USE GLOVES WHILE APPLYING. Dark Envy Red Neutralization Mask has a combination of blue-green direct dyes for red neutralization How To Use Use 1-2X a week following the Green Shampoo, towel dry, … Dark Envy Red Neutralization Hair Mask has a complex concentration of dyes to neutralize red undertones on dark brunette bases while deeply nourishing the hair fiber and leaving a radiant sheen.