Much of the hair fibre is invisible to the naked eye and the layer that we see is known as the cuticle. If you were to look at it under a microscope it would look Kisimilar to overlapping roof tiles in appearance. These scales are held together by lipo protein cement. When the condition and quality of the hair is compromised, the cuticle scales (roof tiles) are lifted instead of lying flat and the cement that secures them together is lost.
Shampooing, and particularly conditioning, helps to lay those tiles back down and cement them back together. Many of the more sophisticated hair care brands have special ingredients that work just like the cement. You’ll often read on the back of a shampoo bottle all about repair, proteins, lipos and cement actions it is baffling sometimes but basically this is exactly what it refers to.
Much of the hair’s other characteristics, its colour, shape and texture (what I call its personality, determined by your DNA) is housed in the inner layer of the hair, the cortex. Colourants, perms, relaxers and some conditioning agents set to work on this inner layer to change the DNA personality of your hair for a longer lasting result.
Heat styling and blow drying only works on the outer layer (the cuticle) and therefore these effects are only ever temporary. Which is probably a good thing you probably wouldn’t want to change your hair’s personality so easily!
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