Schwarzkopf Professional GOODBYE YELLOW is a highly-pigmented wash that offers an instant tonal deposit to counteract and neutralise underlying yellow tones. It cleanses hair gently while strengthening thanks to the integrated Bonding Technology.GOODBYE YELLOW is for clients looking to maintain their cool blonde by neutralising any underlying yellow tones, preventing colour fading and enhancing colour intensity.What it Does.Neutralises yellow undertones.Counteracts cool tone colour fade.Helps to prolong cool-tone luminosity in between salon visits.Quick & easy to apply at the backwash.Vegan formula, free from animal derived ingredients.How to UseIN-SALON SERVICE.Apply as a shampoo on wet hair and leave for up to 5 minutes* depending on technique.Rinse hair thoroughly after application.Colour result and longevity vary depending on hair condition and processing timeUse professional gloves, protect clothes, surfaces and skin from staining and discolouration.HOME MAINTENANCE.Use daily for maximum tonal deposit.Use 1-2 times per week for tonal maintenance.How it Works.The calibrated pigment combination of purple and blue direct dyes is formulated to neutralise unwanted yellow undertones whilst gently cleansing the hair.The unique 4.5pH formulation helps the colour pigments to adhere to the hair quickly for maximum neutralisation. A combination of colour deposits and active washing substances allows for neutralising, cleansing and care in one simple step.