Covering each section with a flat foil technique (Sandwiching the section of hair with foils, no folding needed).Starting at the right side of the nape, taking 1/4 inch horizontal slices, applying Formula 1 at the most needed targeted area then throughout the entire section with a wide, long bristle color brush.Vertical part separating hair down the center back isolating each section with clips.Sectioning: Followed pattern of hair color revealing affected hair needing to be corrected, securing unaffected hair on top of head shape with a clip
