Its acid pH contrasts the base pH of the dye and returns the hairs pH to its natural level with the resultant strengthening of the hair, achieving a longer duration of the colouring.
The acid shampoo has been specially formulated to be used after applying hair colour.
The acid shampoo has been specially formulated to be used after applying hair colour.
The acid shampoo has been specially formulated to be used after applying hair colour. |