Add shine to your blonde hair with the new L'Oreal Professionnel Serie Expert Color Corrector Blondes 150ml The lightweight, purple cream will eliminate the unwanted brassy tones from your hair while correcting the yellow tones in the hair to help you achieve a salon grade result every time. Gently conditions each strand of the hair to smooth out all tangles. Apply to your hair and leave for 5-10 minutes. Then rinse throughly.