Colours such as Black, Brunettes and Reds are harder to remove and may need a few Colour Remover processes.
If you are trying to remove a Hair Colour that was used with a No Lift or 20 Volume Developer it may be harder to remove. Box Colours or supermarket Colours can also be stubborn to remove and may need a few Colour Remover processes.
The longer you have been Colouring for - months, years - the longer it will generally take to remove the Colour because of your Colour Build Up. Colour Build Up requires a few applications, this generally means a few applications of Colour Remover will be needed to fully clean out and refresh the Hair.
Colour lock shampoo and conditioners can stop Colour Remover from doing its job. If you are currently using a Colour lock product, stop use and wash your Hair with a regular shampoo and conditioner for a few weeks before you Colour Remove.
Colour Remover will only remove Permanent Hair Colour that is Darker than your Natural Hair Colour. Colour Remover cannot remove Lightened Hair. Colour Remover will not remove Semi Permanent Hair Colour, Henna Colour or Natural Greys.