As a hair stylist, it is important to have a technical knowledge of hair; this knowledge will be an asset to you as a professional cosmetologist. Hair like people, come in variety of colors, shapes, and sizes. To keep hair healthy and beautiful proper attention must be given to its care and treatment. Applying a hash cosmetic such as one that contains lot of alcohol or providing improper hair services can cause the hair structure to become weakened or damaged. Knowledge and analysis of the client’s hair thoughtful suggestions for its improvement, and a sincere interest in maintaining its health and beauty should be the primary concerns of every hair stylist.


Hair care is very important.

The study of hair, technically called trichology {TREYE-KOL-O-JEE}, is important because stylists on a daily basis deal with hair management. The chief purposes of hair are adornment and protection of the head from heat, cold and injury. Hair is a part of the skin. The threadlike outgrowth of the skin and scalp called hair has no sense because of the lack of nerves in it yet there is feeling because of the nerves under the follicles. Hair is composed chiefly of the protein keratin (Kerr-Ah-Tin) which is found in all horn type growths including the nails and also the skin. The composition of hair varies with its color. Darker hair has more carbon and less oxygen the reverse is true for lighter hair. Average hair is composed of 50-65% carbon, 6-36% hydrogen, 14-17% nitrogen, 0-5% sulfur and 20-85% oxygen.


The Parts Of Your Hair Consist Of:

Cuticle: Outer layer of the hair. It is made up of layers of scales which interlock with the cells of the hair’s inner root sheath to firmly anchor it in the follicle.  This is a thin and colorless layer.  Black hairs cuticle layer can be twice the thickness of that of white hair.



Cortex: The middle layer. It is composed of cells which are tightly bound around one another. These bands provide the hair with elasticity and strength and are very receptive to chemicals.  As a result, they can easily be influenced (or damaged) by dyes and relaxers.



Melanin: is contained in the cortex and is the substance that determines the color of our hair and skin. The more melanin, the darker the hair or skin.



Follicle: This is the name for hair before it emerges from the skin. Follicles are composed of many elements including carbon, hydrogen and oxygen. Healthy amounts of these elements can improve the hairs’ condition and appearance once it emerges.



Sebaceous/Sudoniferous Glands: Attached to the hair follicle are the sebaceous (oil) and the sudoriferous (sweat) glands. The sebaceous glands open and close continuously to release a waxy sebum oil into the hair follicle and onto the scalp. The sudoriferous glands contain many small structures with porous openings leading to the skin. They produce substances which dry on the skin including salts, acids, water and bacteria. If not completely dissolved and effectively removed from the scalp, they can help cause severe itching and dandruff.  Thus, the scalp problems some people experience in the early stages of locs.