26/03/2022
At normal pH, the hair is healthy, remains smooth and shiny, since its hydro-lipid layer is not weakened, and the cuticle is closed. Alkaline products can disturb the pH balance of hair: soaps, shampoos (not all), dyes, bleaching or permanent waving compounds. After using such products, which slightly open the hair scales, the strands become dry and dull, can break and split, and are difficult to comb.
