Discover the salon insight behind treating roots and lengths separately when applying hair color with an explanation from Vidal Sassoon Atelier Colourist Stuart Ross.
If you’ve colored your hair before, your roots and lengths are no longer the same quality of hair. The hair at your roots is untreated, meaning the strands are less porous, and require more color, for longer, to change color. Lengths that have already been colored are more porous, so they change color more quickly.
Expert colorists helped develop Salonist based on this insight. The revolutionary 2-step salon technique lets you treat roots and lengths with different formulas for seamlessly blended color, full of depth and tones.