- We needs clothes to keep warm, provides physical safeguards to the body, protect the body from climate and environment’s harm.
- Our face need protection as well, protection from ultraviolet rays, the dirty air, dirts, so that we can maintain a beautiful and fair complexion skin.
- Therefore, if you only pay attention to skin care series and not sun block, your skin care regime effort is equal to only half.
Frequent skin problems related to sunlight ;
- Dry / Peeling
- Spots, freckles, pigmentation
UV damage to the skin
- UVA/long wave
The energy reaching the surface is 100 times that of UVB, which mainly destroys the breakage of the underlying fiber and causes aging.
- UVB/medium long wave
Mainly causes sunburn, dullness, dry skin, redness, heat and pain, and is a cancer with high carcinogenicity.
- UVC / short wave
The penetrating power is short-wave part that can be absorbed by the ozone layer, mainly causing skin to cause skin cancer
Sunscreen Coefficient :
- UVA protection: Prevents tanning.
- PA (Protection Grade of UVA).Refers to the ability to defend against UVA.
- PA+ (protection from UVA damage)
- PA++ (equivalent protection)
- PA+++ (excellent protection)
- SPF measures sunscreen protection from UVB rays
- SPF stands for Sun Protection Factor. SPF numbers on a package can range from as low as 2 to as high as 100
Sunscreen product analysis :
- Sun protection is divided into: Physical sunscreen or Chemical sunscreen
- Physical sun protection principle: Using the principle of refraction and radiation, the particles of the sunscreen product directly block, reflect or scatter the purple line.
- Photoprotection involves both primary and secondary protective factors.
- Primary factors are sunscreens; these include physical barriers which reflect and scatter light, and chemical barriers which absorb light.
- Secondary factors include antioxidants, osmolytes, and DNA repair enzymes which help to limit skin damage by disturbing the photochemical cascade that takes place by UV sunlight.