Is it better for my hair to be clean or dirty when I apply John Frieda® Precision Foam Colour 4PBN Salon Blends Dark Cool Espresso Brown?
As mentioned in the user guide, it is best to apply the product to hair that does not have a strong build-up of styling product. If you have styling products on your hair, please wash your hair one day prior to colouring with this brown hair dye.