The microparticles of PKC penetrate the cortex of hair filaments acting as a complex repository, infusing hair with strength, softness and shine. Within minutes, the PKC is naturally absorbed. Flat Ironing fuses the PKC particles to cortex proteins, shielding the fibers and completely sealing the cuticles. Through this process, the PKC surrounds extraordinary hair with natural softness. Ideal for thick and resistant hairs.