Hair dyeing is one of the most common means of modern makeup, which uses plants (such as avocado, henna, Polygonum multiflorum, etc. ) or chemical pigments to dye the hair in the desired color. This is one of the most common services in modern barber shops.

There are two main uses of hair dyeing: one is to dye black to cover white hair; Second, for the sake of fashion, change the hair color with the mood, cooperate with the clothing and makeup, and fully show the personality. Dyeing hair has become a fashion. Young people can change the color of black hair with their moods, and fully display their personalities with their clothes and makeup. Middle-aged people have to dye black frequently because they keep growing white hair.

2065438+071October 27 17 The list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Hair dyeing products (personal use) are included in the list of three types of carcinogens.

Hair dyeing is divided into plant and chemical. The characteristic of plants is that they do not harm the body, but the disadvantage is that they are single in color. Chemical dyeing is seriously polluted and destroys the blood system. Plant dyeing is gradually accepted by people, and there are more and more institutions to promote and study plant dyeing.

Chemical dyeing changes the structure of hair and the process of eroding scalp, and ammonia corrodes and invades hair follicles. Plant hair dyeing is a physical process, and nourishing elements are attached to hair and scalp like films, nourishing and caring hair and nourishing hair follicles. Just like a cut apple is covered with an oxide film, plant hair dyeing uses physical oxidation process to attach nourishing ingredients to hair and scalp.