How do the products work in the sun?
In order to understand how sunscreen and tanning products work, it may be useful to explore what happens to your exposed skin without them. The sun generates three types of radiation- infrared, visible light and ultraviolet. Of these three, only ultraviolet radiation causes skin tan or burn. Ultraviolet radiation is generally divided into three forms: UV-A, UV-B or UV-C. Only UV-A and UV-B reaches the skin and only UV-B is associated with the most difficult forms of skin damage, such as wrinkles, burning or melanomas. Melanin is designed to absorb UV-A and UV-B radiation and finally create a protective layer of darker skin cells that most of the fluctuations are looking for. However, the ability of melanin is limited by genetic and racial factors, allowing many people with lighter skin to receive too much UV-B exposure and skin damage. Commercial ononce or sunscreen complements the body products of melanin through chemical or physical bonding with skin. Ingredients such as zinc oxide wereY mixed into a creamy base and processed by diverting the sun's rays from the nose and face. These sunscreen products worked well for specific areas, but were impractical to apply the whole body. Today many people who have to work outside for hours like lifeguards or gardeners still use zinc oxide creams as aids
Modern sun products such as creamy face creams rely on the chemical mechanism. The different products in the sun protect against different forms of UV radiation, so it is important to choose one with UV-B or "wide spectrum" for maximum benefit. Many sunscreen contains a component that absorbs UV rays a lot of the Skin's Natural Melanin. One of the most popular ingredients is Paba, short for para-aminobenzoic acid. Paba absorbs UV-B rays, but can also cause some allergic reactions. Broad Spectr productsUM Sunblocking contains other chemicals that absorb both both UV-A and UV-B radiations.
When applying any products in the sun, it is important to allow some time to absorb for complete absorption. Many experts recommend waiting at least 30 minutes before exposing the sun or water. Another important aspect is the evaluation of SPF (Sun protection factor) of a particular product. This information should be included on the product package. SPF 15 is generally considered a minimum for those who do not burn or vulnerable to burning. However, the higher SPF number is not a guarantee against sun damage and almost all tanning products should be reused after several hours.