Hair colors are used for changing the looks of hairs and getting rid of undesirable hair color. For example, many people having gray hairs color them with natural black or brown hair color for getting different looks. Similarly, people having black hairs make them blonde by using hair colors. There are basically three types of hairs colors that can be applied. These are temporary colors, semi-permanent colors and permanent hair colors.
Temporary hair colors last up to washing of hairs only whereas semi-permanent hair colors can withstand five to six washings. Permanent hair colors alter the color of hair permanently and do not get fade until hair grows out. Most of people apply permanent hair color, as it remains on hairs for longer durations. Before using any type of permanent hair color, it is necessary that a person must know its effects.
The Effects of Permanent Hair Color
Permanent hair colors are of two types. These are oxidative hair colors and progressive hair colors. Oxidative hair colors depend on two ingredients and these should be mixed before application. Active ingredients of oxidative color include hydrogen peroxide and alkalizing agents. On the other hand, progressive hair colors change the color of hair gradually. Active ingredient of these colors is mostly bismuth citrate or lead acetate. It should be understood that all types of permanent hairs colors work by removing the outer protective layer of hairs, which is composted of lipids. New color is deposited in hairs by removing natural color. When protective outer layer of hair is removed, it is not able to repel water.
Thus, water is absorbed into hairs and hairs become fragile. In other words, use of permanent hair color makes hairs fragile and they become more prone to damage. Tangling of hairs also occurs frequently. Many people report about dryness and roughness of hairs due to regular use of permanent hair color. Though color of hair is changed, hairs lack shine and if not taken care of properly, they can become dull also. This is the reason why many hair experts advice that after applying permanent hair color, hairs must be treated with a deep conditioner, which forms a protective layer on hair and prevents it from damaging.
There are some permanent hair colors that contain coal-tar colors. These ingredients have the capability of penetrating the skin and thus, can pose serious risks. In a research, it has also been proved that some of ingredients contained in permanent colors may lead to formation of cancerous cells. These ingredients are 4-methoxy-m-phenylenediamine, 2,4-toluenediamine, 4-amino-2-nitrophenol and 4-chloro-m-phenylenediamine.
Since some of ingredients of permanent hair color can be absorbed into the skin, pregnant women are advised not to use these colors during pregnancy. In some cases, chemicals enter the body through fumes also. For example, some permanent hair colors contain ammonia, which has a strong fume. If ammonia enters body of pregnant woman while inhaling air, it may affect the growth of baby.
Harmful effects of permanent hair color can be prevented to certain extent by applying color in a properly ventilated area and by rinsing the scalp thoroughly with water so that all residues are removed from hairs and scalp. It is better if a patch test is conducted before permanent hair color application.