Multiple applications of Colour on top of Colour over time will leave you with Colour Build Up. Colour pigment fills the Hair shaft and eventually stops the Colour process from working, resulting in no change to your Hair Colour.
There are 4 key signs of Colour Build Up in the Hair:
Your Hair is dull and stripped of its shine and gloss.
Colour Build Up creates dry, coarse Hair Colour that even the most expensive treatment can’t fix.
Colour Build Up adds weight to the Hair shaft, making the Hair look and feel heavy and weighed down in Hair Colour.
Bright, fresh Regrowth and dull, heavy ends are a sign of Colour Build Up.
You can remove Colour Build Up by Colour Removing your old Hair Colour. With each application of Colour Remover, make sure you have enough Product to completely cover your Hair and apply only to your Coloured Hair. Keep in mind you may need to do more than one application to clear out your Build Up.
Do a Strand Test with your next Hair Colour. If there is no change to your Hair, there is still Colour Build Up.