What is over bleaching of hair and the causes?
Too much bleaching will destroy the hair’s structure. Even if the hair doesn’t actually break, it can become spongy, porous on patchy in colour. Further chemical processing – colouring, toning, perming or general hair styling-in then becomes very difficult. When wet over bleached hair stretches like chewing gum and the effects of blow drying or styling cannot last. If hair even reaches this state, it needs to be treated very gently and conditioned; all harsh processes must be avoided Some causes of over bleaching : The hydrogen peroxide solution was too strong.