Health and Beauty Coloration Matrix SoColor Pre-Bonded Permanent Dye 90 ml 5A Pre-mixed permanent hair color that delivers brilliant color right on target. Our permanent and demi-permanent oxidative dyes blend seamlessly, so you can achieve consistent, scalp-to-tip color that lasts and fades in tone. Premixed: Our formulas are pre-mixed with background + reflect, so you can neutralize all underlying pigments. How to use: Standard Mixing Time: 30 to 45 minutes (full 45 minutes for resistant gray hair) High Impact Chestnuts: 1:1.5 mixing ratio, 35 minute mixing time Ultra.Blonde: 1:2 mixing ratio, 50 minute mixing time Reflect Collection Metallics: 1:1 mixing ratio with 20 volume or 30 volume Matrix Cream Developer. The time is 35 minutes.