Montibello Colour Correction Stop Yellow Shampoo 1000ml Stop Yellow is the first shampoo that incorporates vegan technology that instantly neutralises unwanted yellow undertones with less sulphates for sebum build up. Stop Yellow is formulated with purple and intense violent agents for neutralising unwanted yellow tones on dyed, treated,  lightened or bleached blonde hair between certain bleach levels of 7-11. The shampoo keeps your hair and colours intense vibrant and consistent. The shampoo neutralises brassy reflections from bleaching residue and prevents oxidisations from occurring and altering the colour of your hair dye.   This smoothing shampoo is ideal for all hair textures and is recommended for use once a week to maintain a longer-lasting brighter and bolder blonde. How to use:  Apply to wet hair, massage and leave on for up to 5 minutes, lather and rinse, repeat if necessary (2 applications are recommended to first lift dirt and oils from cuticles and then to cleanse)