- Dyeing hair is to use hair dye to change the color of the hair, so as to beautify or change the effect of the image, and hair bleaching and dyeing can be divided into temporary, semi-permanent and permanent. Dyeing your hair can be done by a professional hairdresser or at home. Hair color is very popular in the United States, where about 75 percent of women dye their hair. In 2011, americans spent $1.9 billion dyeing their own hair at home, and that figure is expected to rise to $2.2 billion by 2016.
- Dyeing hair is an early custom. In the southern song dynasty, he changyu wrote a satire on lu zhan’s dyeing of hair, “lu zhan dyed his hair and beard to flatter the side room. Green puzzled for a long time, star line comeback. [1] liu yuxi, a tang dynasty poet, said in his poem, “the recent times are light on the predecessors, who are good at dyeing their mustaches. In the modern sense, hair dye was invented in 1907 by Eugene swilla, a french-born German chemist and the founder of leia.
- Hair dye can be divided into two kinds, a kind of for chemical hair dyes, its composition containing benzene class (such as: para-phenylene diamine) and Ammonia (English: Ammonia, commonly known as Ammonia), hydrogen peroxide, and chemical pigments, to replace the hair color or fill in empty sac of pigment in the hair, dyeing in order to achieve the purpose.
- The other is natural hair colorant. The purpose of hair colorant is fashion trend, performance, or changing image or mood. It will also change the external age.
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