article_snippet: Not only does maintaining the regrowth take a lot of commitment but the chemical process of bleach on the hair can be incredibly damaging.'
article_snippet: Andrew says: 'Of all the colouring methods, bleach is the most damaging, and should always be done professionally and slowly. '
article_snippet: Bleaching raises the cuticle on the hair, removing colour pigment permanently from the hair shaft, a process which is called oxidation. '
article_snippet: Bleaching can permanently raise the cuticle, leaving hair dry, brittle and porous.
article_snippet: Overlapping bleach in the same place leaves hair feeling weak and elastic, which can then lead to hair breakage.'
article_snippet: Andrew added: 'Overuse and repeated application of bleach to the scalp can strip the hair of moisture and damage the follicle. '
article_snippet: Any would-be blondes should think about trying a toner before giving the bleach a go, says Andrew.
article_snippet: Bleaching takes hair to a very raw colour state.