Can I use Tints of Nature over another hair colourant?
Tints of Nature can be used over other hair colours, except metallic based products. If you have used a hair colour which contains a metal such as lead acetate, zinc, iron or copper, please wait at least one month before using Tints of Nature and shampoo your hair thoroughly during this time. This advice also applies to using Tints of Nature over a henna colour, which can leave a waxy residue on the hair and make colouring difficult.