subject: The Elemental Knowledge Of Hair-Dressing Along With Hair Protection [print this page] Everyone wants to have glossy black hair, it is not only a symbol of healthy, but also can make you shows even more elegant with a suitable hairstyle,giving people a feeling of beauty. Choose Most Sizzling cocktail dresses for Officers Therefore people choose all kinds of shampoo or hair care products to strengthen their hair, but many people ignore the sunlight, particularly the damage of ultraviolet radiation to the hair.Trend Alert! Julianne Moore in mother of bride dresses
Hair following prolonged exposure to the sun, whether it burns, dyed hair, or natural hair, will fade, dehydration, dry and fracture. The obvious example is the "beach people" features after staying at the beach for many hours, a red-brown skin and "bleached yellowish" hair. The hair is mainly composed of the composed keratins by 18 kinds of amino acid, the amount of cystine it contains is far more than the other amino acids, and the special three-dimensional structure of keratin makes the hair elastic.
One of the hair functions is to protect the hair and scalp from sun radiation. Because the corneum of hair can reflect sunlight and can absorb some sunlight, and it exactly depends on cystine to absorb ultraviolet ray. If let hair expose in sunshine in a long time, the disulfide bond of cystine will break, dismiss, and reduce and lose the ability of absorbing ultraviolet ray. The hair dyed is more vulnerable to de demaged and fade by sunshine than natural hair.
This is because hair has been hurt by Chemical substance, add the hair dye--especially organic dye, they are unstable when face to light, and are easy to fade, dismiss. The commonly used agents when doing perms mainly contains the reductive ethanol sulfide salts and the "cold perm lotion" as cysteinyl acid derivatives.
Of these substances so that the hair of the disulfide bonds broken, cystine is reduced to the cysteine thiol-containing hair soft, with the curlers fixed bending deformation, and then oxidized by the oxidizer stereotypes. This oxidation process is staggered so that each of the cysteine thiol molecules reassemble into a new cystine, hair restoration has just toughness. The damage of the hair which has been suffered from the chemical damage will be deepened when exposure to the sun again, and the hair will be porous, lose water, wither and decline in tensile strength.
The damage of sunlight to the hai rcause the attention of people increasingly! In order to protect the hair, one is to take physical methods, to wear a hat or take an umbrella in the open-air, or durning field work or travelling. Second is chemical protections, use some UV absorbers help cystine absorbing UV, these substances have a strong absorbing ability to UV whose length is 200 to 360 nm.
Don't stimulate the skin, less toxic, commonly seen on the amino acid esters, salicylic acid esters, these "sun" material has been added to shampoo, hair conditioner, eruptions etc. products. Confirmed by research, these UV absorbers reduce the break of disulfide bonds and hurts and fade of cysteines.
The Elemental Knowledge Of Hair-Dressing Along With Hair Protection
