How to block uv radiation in the summer

So, how can ability prevent ultraviolet ray effectively? 

 

First, understand your skin condition, and then determine how much uv protection you will have. 

 

Oriental‘s skin, can be divided into three types. One is the color of the white. This type of skin will soon become red and even blisters, though not easily tanned. This is the most vulnerable skin. The second is moderate skin tone. The skin is slightly red and slightly darker after being exposed to ultraviolet light. The extent of exposure to uv radiation is moderate. Three is dark skin. This type of skin, after exposure to ultraviolet light, is neither red nor black, which is not susceptible to uv damage. 

 

Ultraviolet intensity of different time and place 

 

Hot summer is the most active period of ultraviolet ray, in which UVA rays and UVB rays are rays that contain two kinds of skin damage, which are found throughout the year. UVA rays, the longest wavelength, strong penetrating power, can penetrate to the dermis of the skin, serious damage of dermal collagen fibers, first the skin to become red, but not how long will from red to black, tan sunburn easily. UVB rays have a shorter wavelength and are the most carcinogenic. They can penetrate the epidermis and make the skin rougher, causing wrinkles and discoloration. UVB sunburn capacity is 1000 times higher than UVA. The most lethal time of the day is 10:00 am to 2:00 PM. Severe damage can be done.