In the nineteenth century as the sun any prescribed balneotherapy optionally as a medicine, then the concept of white skin as a sign of beauty, change radically.
In 1929, Coco Chanel French fashion designer imposes brown skin as a model of beauty and health. Gradually, and to present the exposed parts of the skin surface are being greatest if not in its entirety.
Likewise, and in order to maintain as long as possible dark appearance is made more prolonged sun exposure during hours of most intense radiation.
Lately they have proliferated a large number of artificial solar facilities and outdoor sporting activities persist virtually all times of the year for many social sectors.
This abuse and excessive exposure to sunlight has led to an increase in diseases, especially tumor, skin, a fact that dermatologists have already detected many years and therefore been warning about the consequences of excessive sun in the skin.
It is clear that the Sun is necessary for life as a beneficial influence in many aspects, heat, light, circadian biorhythms, physiological phenomena neuroendocrine disturbances in the psychic sphere seasonal pattern, formation of the provitamin D, photosynthesis of chlorophyll in the plants, etc., of which we can not ignore, even as treatment of certain skin diseases. It is also a source of energy that the industry takes to transform it into heat or electricity. But all this does not indicate that this radiation is used in an inappropriate manner for the sole purpose of being tanned. On this page we discuss, in a concise, comprehensible, all that should be considered on solar radiation and skin.
The color of the skin in Caucasian ethnicity (white) is given mainly by the proportion of melanin. The degree of pigmentation of the skin must be distinguished from basal pigmentation, ie, the parts covered and without prior exposure to the sun, and pigmentation gained by the action of light. The basal pigmentation is a constitutional and genetic trait. This has helped establish a classification of four types according to their degree of skin pigmentation.
TYPE I
Skinned, burn easily and are not pigmented
TYPE II
White skins, they burn easily and are pigmented little
TYPE III
Moderately pigmented skins, they burn quite easily but take some degree of pigmentation
TYPE IV
Brown skin. It is difficult to burn
Source: http://www.cancerpiel.com/tipospiel.htm
photo source: http://allwomenstalk.com/
Tags: pigmentation, skin types, Skin Types According to Degree of Skin Pigmentation
