Innovative and unique ideas

Scholars reported that the nearly 20 years of global ozone layer every 10 years on average by 3.5% reaches the surface by ultraviolet (UV) increasing year by year. Sunlight can reach the Earth's surface, including UV, visible and near-infrared. most UV on human skin. Excessive clothing spot UV causes sunburn, skin pigmentation, wrinkles, photoaging and skin cancer, have been a number of reports. To this end, the Sun (light) agents of development and use have been growing rice. Sunscreen products for more than 50 years of history, sunscreen function h sunburn development has evolved from a single protective skin for UV protection for short-term and long-term damage to human skin. While the use of sunscreens leisurely evening of history, and kinds, branded policy. but can be used as topical preparations of drugs used to treat the light skin disease is poorly understood. Stanley in 2001, it was reported, so far abroad as street drug UV absorbers have only 5 species. There is no big sun light dermatosis treated drug. In fact, some high sun protection factor has against UVB (CVB and anti-ultraviolet a (UVA) features of sunscreen can be used for prevention and treatment of light dermatosis.

 

 

 

 

 

 

 

Sunscreen protection effect and significance

Formal of city z anti-Sun agent of trademark Shang are marked has UVB anti-Sun coefficient (SPF) and UVa anti-Sun grade (PA) o its exhausted righteousness and pursuant to following: light in must distance irradiation, caused skin produces just can sleep Liu to of erythema reaction by needed of irradiation time, for a minimum Erythema basin (MEU) o SPF of defines for: topical anti-Sun agent parts skin produces minimum Erythema by needed of UVB radiation dose and is not with anti-Sun agent parts skin produces minimum Erythema by needed of UVB radiation dose of ratio. After the SPF value refers to: apply sunscreen is a multiple of uncoated sunscreen effect, SPFI5, Sun induced skin Erythema Liu's time was not painted by 15 times. Exposure to light at a distance. produces the lightest pigmentation of the skin caused by time, is called a minimal black variable (MPPD). Anti-UVA sun protection factor (PFA) measured by MPPD. PFA= sunscreen coating site MPPD/not sunscreen coating of parts of MPPD, UVA sunscreen effect differs from UVB PA, PA, and with numbers, or with a "+." after "+" stronger the more that its role in anti-UVA.