The in-between neutralizing step that can reveal or emphasize cool shades and ashy highlights USAGE: Use this Ultimate Blonde Neutralizing Blonde Spray to neutralize unwanted brassiness that may appear after lightening. The violet pigment neutralizes instantly. Simply mist on wet hair section by section, and comb through at the sink.Leave-in or rinse out depending on desired neutralization ADVANTAGES: Neutralize unwanted brassiness Leave-in for stronger results or rinse-out Professional use only