Ultra Violet

By · Tuesday, January 5th, 2010

Ultra Violet

Hair is dead and needs no protection against ultraviolet (UV) and carcinogenesis of the hair shaft is not feasible, and even damaged hair can be eliminated and replaced by new growth.

Like the natural fiber, natural human hair material is subjected to photoyellowing, a chemical process by which the wool, cotton or silk, and bleaching human hair after sun exposure.
Human hair contains three melanin pigments. The first two, eumelanin and pheomelanin, representing brown and red colors found in hair, respectively. The third pigment, oxymelanin, hair is after raw material has exposed to sunlight. This melanin reduces the aesthetic value of hair and hair dye and perm affecting.

Hair lipids wrap the hair shaft gives shine and manageability, but if they are absent, the hair is vulnerable to static electricity, hair breaks to abrasion, and is very curly.

In order to understand the hair photoaging, first, is essential for understanding the interaction between UV radiation proteins hair. Hair has a cuticle that provides protection outside of the inner bark, consisting of fibrillar proteins. These proteins are responsible for force hair. At the same time, melanin pigments are embedded in a matrix protein in the cortex. Thus, sunlight damages the hair by physically makes the weak axis. At the same time, encourages the production of oxymelanin sunlight, resulting in the reduction of pigment and hair color clarification.

As regards topical photoprotection exogenous hair, was not different from the photoprotection of the skin. UV products for hair care such as conditioners snapshot, style gels and hair sprays have been added-B and UV-A sunscreens. However, this approach currently not in creating a uniform film that covers the entire surface of each hair on the head. On the other hand, is impossible because the total surface area of hair on a human head is huge. It also would ideally be sunscreen and paste the hair cuticle hair wrapping each in thickness, but without making the hair look greasy.

Sunlight exposure leads to clarify hair color and eventually damage the fiber. However, it has been shown that the unpigmented hair is more vulnerable to UV than pigmented hair, which indicates that color granules provide some photoprotection hair from oxidative damage.
If the natural pigments provide photoprotection hair, then synthetic pigment deposition in the cuticle and within the cortex through hair dyes may protect hair. There are two types of hair dyes: semi and permanent.

Semi-permanent hair dyes are made from a combination of dyes to reach the final desired color. They are left in the hair for 25 minutes. Although the dyed hair fibers from damage, the damage is unbalanced by the antioxidant effect of color and deposited on the hair shaft as Hair is exposed to UV radiation. The darker the color of hair dye, hair more photoprotection provided.

Permanent hair dyes penetrate deeper into the hair. While acting as agents of photoprotection of hair, thus causing further damage peroxide hydrogen and ammonia used to make chemicals penetrate the hair shaft. Despite producing more the cuticle and the axis of the structure of damage to your hair, hair dyes provide better photoprotection alkaline because they reduce the damage to your hair fiber proteins, which act as filters for passive picture.

As well as hair dyes, there are hair products that can otherwise act as agents for photoprotection of hair, among which we find shampoos, conditioners instant, deep conditioners, and hair products. Some shampoos for hair dyeing include sunscreens. They are designed to extend the color-treated hair. However, the UV protection of shampoos is quite difficult because the surfactant is thoroughly washed before styling.

Moreover, conditioners can achieve a better deposition of sunscreen in their hair. Although not as effective as deep conditioners that remain in hair from 15 to 30 minutes, instant conditioners are applied after the shampoo and wash before towel drying. In fact, the contact time of conditioners sunscreen containing hair fixes the amount of hair photoprotection. The more the better.

Probably the best UV protection products are finished products that are administered after drying his hair and brushing among them conditioners, gels, style, and hair fixatives. Blow drying conditioners are applied by massaging into wet hair before drying. Design gels can not provide much protection when applied only to certain areas of the hair, as the roots of the hair shaft or gratuities. Hair Sprays Hair a similar effect photoprotection, as they are applied as a film to a close ended comb.

Although a variety of UV protection products for hair photoprotection exist, the best UV protection would still be the use of hats, scarves or umbrella.

Carol Thopmson is doing research on Hair Ultraviolet Protection for quite some time. She has written a number of articles on Photodamaged Hair, and has shared her findings through TV talks.

Stiff Dylans — Ultraviolet

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