When hair is wet, it is in its weakest state.
According to Dr Tim Moore, PhD in Microelectronics from Cambridge University and Chief Technology Officer at ghd, our locks can bear up to 30 per cent of their own weight in water. He explains, “It all starts the moment you wet your hair. It changes the molecular structure of the strand straight away. When water is applied to hair, it is absorbed through the hard outer layer of the cuticle into the cortex, which then swells up. This means it’s instantly weakened.” And the longer it’s wet, the more damaging this can be.
