First developed back in 1909 by Eugene Schuller, a French chemistry expert, crazy colour hair dye is now a massively popular trend with over 75% of women colouring their hair to rid themselves of their boring natural colour. Thanks to the main chemical ingredient, paraphenylenediamine, as well as a number of other substances, hair dye works through a number of different chemical reactions occurring which effect the molecules and pigments of the hair, ultimately changing the colour.
What Exactly Is Hair Made Of?
Hair is mainly made up of the protein keratin, which is also found in fingernails and skin, but the colour itself depends on the amount of phaeomelanin and eumelanin your natural hair contains. If you’ve got higher levels of phaeomelanin in your system, then you’ll likely have blonde, red or ginger coloured hair, while eumelanin encourages brown and black tones. If you’re missing these proteins, you’ll have a white or grey coverage.
People haven’t only just begun colouring their hair, in fact they have been doing it for many thousands of years, although only with chemicals since the 20th century. Before this, people used plants which contained natural dyeing agents like walnut and henna, while others contained ingredients which bleached the hair, such as citric acid. These natural dyes worked by covering the hair shaft with a different colour, and while some last through a couple of shampoos, it is generally quite challenging to get long lasting and consistent results using natural ingredients.
How Temporary Crazy Colour Hair Dye Is Different
One step up from natural colouring is semi permanent dye, which works by grasping on to molecules in the hair strand and changing the colour of the hair. Using shampoo will eventually remove these molecules from the hair, returning the natural colour. Unlike permanent dyes, temporary crazy hair colour doesn’t contain the ingredient ammonia, which opens up the hair shaft during dyeing, and this is why the natural hair colour remains once the hair is washed enough.
Permanent hair dye reacts inside the hair strand itself, to add or remove colour. Most permanent forms of hair have a two-step process which begins by removing the natural colour from the hair, before covering it with a layer of the new shade. It is the same process as hair lightening, with the difference of adding that colour to the hair afterwards, instead of just removing it. Along with ammonia, peroxide is an important ingredient which removes the natural colour, breaking the existing chemical bonds in the hair.