Cevaplar

2012-11-06T14:23:03+02:00

Shampoo

Shampoo is a hair care product used for the removal of oils, dirt, skin particles, dandruff, environmental pollutants and other cont*****nt particles that gradually build up in hair. The goal is to remove the unwanted build-up without stripping out so much as to make hair unmanageable.

Shampoo, when lathered with water, is a surfactant, which, while cleaning the hair and scalp, can remove the natural oils (sebum) which lubricate the hair shaft.

How shampoo works

Shampoo cleans by stripping sebum from the hair. Sebum is an oil secreted by hair follicles that is readily absorbed by the strands of hair, and forms a protective layer. Sebum protects the protein structure of hair from damage, but this protection comes at a cost. It tends to collect dirt, styling products and scalp flakes. Surfactants strip the sebum from the hair shafts and thereby remove the dirt attached to it.

While both soaps and shampoos contain surfactants, soap bonds to oils with such affinity that it removes too much if used on hair. Shampoo uses a different class of surfactants balanced to avoid removing too much oil from the hair.

The chemical mechanisms that underlie hair cleansing are similar to that of traditional soap. Undamaged hair has a hydrophobic surface to which skin lipids such as sebum stick, but water is initially repelled. The lipids do not come off easily when the hair is rinsed with plain water. The anionic surfactants substantially reduce the interfacial surface tension and allow for the removal of the sebum from the hair shaft. The non-polar oily materials on the hair shaft are solubilised into the surfactant micelle structures of the shampoo and are removed during rinsing. There is also considerable removal through a surfactant and oil "roll up" effect.

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2012-11-06T16:42:29+02:00

Eye shadow

Eye shadow is a cosmetic that is applied on the eyelids and under the eyebrows. It is commonly used to make the wearer's eyes stand out or look more attractive.

Eye shadow adds depth and dimension to one's eyes, complements the eye color, or simply draws attention to the eyes. Eye shadow comes in many different colors and textures. It is usually made from a powder and mica, but can also be found in liquid, pencil, or mousse form.

Civilizations across the world use eye shadow - predominantly on females, but also occasionally on males. In Western society, it is seen[weasel words] exclusively as a feminine cosmetic, even when used by men. On average, the distance between eyelashes and eyebrows is twice as big in women as in men. Thus pale eye shadow visually enlarges this area and has a feminizing effect.


Use

Eye shadow can be applied in a variety of ways depending upon the desired look and formulation. Typically application is done using sponges, fingers, and/or brushes. The most important aspect of applying eyeshadow, and makeup in general, is blending well. An eyeshadow primer or base can be applied to prevent the shadow from fading or migrating to the crease. Many eyeshadow sets come with three colors, the lightest being the highlighter while the darkest is used in the crease. To apply, first lightly blend the base (medium) color all over the lid and then smudge the darker color from the lash line up to the crease. Once the two colors are thoroughly blended, sweep highlighter onto the brow bone and blend. Finish with eyeliner and mascara if desired.

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