The Effect of Coloring on Hair
Even the gentlest coloring affects hair structure. It opens the hair cuticles to allow pigment to penetrate, which can lead to moisture loss, dryness, and brittleness. This is especially true for bleaching and other aggressive lightening procedures.
Keratin straightening, on the other hand, aims to restore hair structure, fill damaged areas, and create a protective layer. That's why many clients ask about combining these procedures.