Hair dyes, also know as hair cosmetics, are cosmetics which can change the hair’s color. Meaning of hair dyes in old China only refers to make the white hair black
Now the black hair can be bleached, decolored and becomes reddish brown, golden yellow, yellow, blue and other colors with different shades.
At present, consumer group of China hair products has two categories. One category is mainly in the elderly silver-haired consumers. This group of people uses different brands of black hair dye, white hair, and white hair flower dyed black. The other is mainly young people, black hair and consumers, they use a different brand of color hair dye biotin, black hair bleaching and dyeing into the international color or color of brown, red, brown, red, yellow and blue and so on.
China since the reform and opening up, by the EU, the U.S. International popular hair color have launched various shades of color hair dye, make the shine of the Chinese hair care market. Especially since the 1990s, the production of high-speed development of Chinese hair dye, hair cosmetics has become the fastest-growing varieties of hair chemicals, according to Chinese Ministry of Health statistics show that, in 1999, China permitted to allow the production of hair products manufacturers 223, its brand over 250 kinds. At present, Europe and the United States and other developed countries, exports to China of hair cosmetics have more brands.
Temporary hair dye hair dye is divided into semi-permanent hair dyes and permanent hair dyes. Physical methods to change the color of the hair very easily removed from the hair without affecting the hair, tissue and normal characteristics of the hair dye substances called temporary hair dye. Permanent hair dye is the most important hair products, the use of oxidation dyes, also known as oxidative hair dye. This hair dye hair dye not only cover the surface of hair, and dye intermediates can deep hair inner layer, and then be oxidized to form insoluble colored macromolecules, so that hair dyeing.
Permanent hair dyes generally can be divided into natural and organic dyes, synthetic organic dyes and three kinds of metal dye minoxidil products. Organic synthetic hair dyes, organic amines, organic phenols and amino phenols dyes, organic dye easy to use, fast-acting, easy to fade the color of natural hair after, so it is the most popular hair supplies. Share of this type of hair dye in the international market has reached 73 percent, made formulations also have a variety of formulations of powder, liquid, emulsion, and cream.
The hair firmness of oxidative hair dye is relatively good. It is relatively stable and difficult to be washed away after using it. But with the adding of hair tonic and influence of the hair temperature, hair dyeing time, hair PH and hair process, many hair ointments often have the situations of bad staining, easy to wash, and instability.
Source:http://www.cosprm.com
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