Only the beauty of the sun for a healthy, protected tan
What is Ultraviolet Radiation?
UV radiation is part of the electromagnetic (light) spectrum that reaches the earth from the sun. It has wavelengths shorter than visible light, making it invisible to the naked eye. These wavelengths are classified as UVA, UVB, or UVC:
- UVA 320 to 400 nm
- UVB 290 to 320 nm
- UVC is absorbed by the ozone layer and does not reach the earth.
Both UVA and UVB, however, penetrate the atmosphere and play an important role in conditions such as
UVA rays
UVA rays account for up to 95 percent of the UV radiation reaching the Earth’s surface. Although they are less intense than UVB, UVA rays are 30 to 50 times more prevalent. They are present with relatively equal intensity during all daylight hours throughout the year. UVA are the dominant tanning rays, which penetrates the skin more deeply than UVB, have long been known to play a major part in skin aging and wrinkling (photoaging).
UVB rays
UVB rays, the chief cause of skin reddening and sunburn, tend to damage the skin’s more superficial epidermal layers. They play a contributory role in skin tanning and photoaging. Their intensity varies by season, location, and time of day.
What is sun protection?
Sun protection is simply guarding a body from the adverse effects of sunlight. Aside from the hazards of heat, the sun poses the danger of sunburn, which can permanently damage the skin and cause skin cancer, as well as premature wrinkling and signs of aging. The best way to avoid the sun damage is the use of a protective sunscreen to minimize the penetration of the sun’s ultraviolet (UV) rays.
What is a sunscreen?
Sunscreen is a topical product that absorbs or reflects the sun’s ultraviolet radiation and protects the skin.
Sunscreen Ingredients
Since both UVA and UVB are harmful, you need protection from both kinds of rays. The sunscreen filters fall into two categories:
- Organic/chemical filters: form a thin, protective film on the surface of the skin and absorb the UV radiation before it penetrates the skin. Ethylhexyl methoxycinnamate, butyl methoxydibenzoylmethane and benzophenone-3 are commonly used.
- Inorganic/physical filters: are insoluble particles that reflect UV away from the skin.
Zinc and titanium dioxide are commonly used.