Colouring hair is very fashionable these days. You can easily see people of all age groups going for hair colouring. People are experimenting with all kinds of colours to look fashionable. It is no longer just natural black or golden people are going for, but they are experimenting with even red, green and blue and coming up with new hair colouring ideas.
Hair colouring has been in use since the ancient times. Ancient Greeks used to colour or lighten their hair, which identified with honor and courage. They used harsh soaps to lighten or colour their hair. There is evidence that ancient Romans also used to colour or lighten their hair.
Now-a-days, colouring hair is very much popular throughout the world. According to some reports around 75% of women in the UK colour their hair. Now people do not go for hair colouring just to hide their grey hair but to make a fashion statement as well. Young people experiment with many hair colouring ideas. The market for hair colours is huge spreading all over the world.
There are many products for colouring hair available in the market. There are permanent as well as temporary colours. A patch test should be conducted before using any colouring product to see if the person is allergic to the colour or not. In the case the person is found allergic to chemicals used in hair colours the use of the same should be stopped immediately.
Some people lighten their hair, which is also known as bleaching or de-colouring. This process involves the diffusion of the natural colour pigment or arificial colour from the hair.
Permanent hair colouring products contain oxidising agent and an alkalising ingredient. These chemicals raise the cuticle of the hair fibre so the colour can penetrate in the hair fiber. They also facilitate the formation of tints within the hair fibre and bring about the lightening action of peroxide.
In the case of temporary colours the the pigment molecules are large so they do not penetrate the cuticle layer. It allows only a coating action that may be removed by shampooing. Temporary hair colouring products come in various forms like shampoos and gels.
Normally temporary colours are used to give brighter colours to the hair. It is because temporary hair colourants do not penetrate the hair shaft itself. Instead, these dyes remain adsorbed to the follicle and can be easily removed with a single shampooing.
The use of colour can cause damage to hair in some cases. It is always better to visit an expert to for colouring hair to avoid any kind of harm done to hair. Colouring hair in some cases can cause breakage of hair strands, hair fall and dry scalp.