Hair Lightener is essentially a Bleach for the Hair. It is used to Lighten the Hair above 3 levels. It is generally used to achieve Blonde Hair from a Darker Hair Color. It’s impossible to make your hair a lighter shade without the help of a bleaching agent – all of which are called ‘oxidizing agents’. Hydrogen peroxide and ammonia are the most commonly used bleaching agents and are often mixed together, as when used separately they’re unstable and very slow in lightening the hair