“The Olaplex treatment no.1 for every blond, foils/balayage services is essential to keep up the internal strength of the hair. While colouring, the internal hair cortex which has the bonds, is exposed to the hydrogen peroxide combined with the bleach powder that opens the cuticles and reacts with the hair’s melanin, removing its pigments. By not using Olaplex, the bonds might break and the hair will slowly decrease its internal strength.“