鲜花( 114) 鸡蛋( 0)
|
Zinc oxide provides protection against the full UVA and UVB range from 280 to 380 nm. Titanium dioxide protects well against UVB rays and short UVA rays, but not against longer UVA rays. however, longer UVA rays which are the rays tan your skin but not damage your skin. the shorter UVB Rays are the more harmful rays which may cause skin cancer. % X6 q3 W' k$ R; w8 `
so Titanium Oxide is a better UVB reflector, Zinc Oxide is a better UVA reflector and moderate UVB reflector.1 N' g9 F+ ]/ D5 k4 y, ~. k
" o; T1 |0 v2 z) [) d+ I
all Chemical Sunscreen ingreadients are not reflectors, they are absorbant/filters. |
|