How The Sun Affects Your Skin - Part II

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How The Sun Affects Your Skin - Part II

How The Sun Affects Your Skin - Part II
 
Last time I talked about the 3 most damaging sunrays in the UV spectrum, UVA, UVB and UVC. Today I will define these rays even further.
 
UVA - Aging Rays – UVA I and UVA II are the rays associated with the UVA ray
  • 320 – 400 Nanometer Range (one nanometer is one billionth of a meter or one hundredth of a strand of human hair)
  • Rays which affect aging and can also cause skin cancer
  • 95% of UV light consists of UVA
  • Penetrates the Dermis which are the deeper layers of the skin
  • It is full strength at sunrise and sunset
  • Penetrates through glass
  • It is the same strength year round and in all weather
  • Florescent lighting omits 2-3% UVA
  • Halogen lighting omits 25% UVA
  • It is present 1,000 times more than UVB
  • It causes two-thirds of all malignant Melanomas
 
UVB – Burning Rays
  • 280 – 320 Nanometer Range
  • Rays that induce sunburn and can also cause skin cancer
  • 4-5% of UV light consists of UVB
  • Penetrates the Epidermis, the outermost layers of the skin
  • Strongest between 10AM – 4PM
  • Responsible for Basil Cell and Squamous Cell Carcinomas
  • Strongest at the Equator
  • Causes Melanin (pigment) Disruption (hyperpigmentation  or dark spots)
  • 10 times stronger in June than December
 
UVC – Most Carcinogenetic Ray
  • 200 – 280 Nanometer Range
  • Shortest wave length
  • Is responsible for the highest rate of skin cancer in Australia, where wearing a sunscreen is a law
 
Factors That Influence SPF Protection
  • Skin Type – fair skin requires higher SPF’s
  • Altitude – every 1,000 feet of elevation increases UV exposure by 4%
  • Location Latitude – UV intensifies as you get closer to the equator
  • Reflective Surfaces – White sand and snow reflects up to 80% of UV light
  • Time of Day – Peak exposure occurs between 10AM and 4 PM
 
What Is A Tan
  • Solar Radiation
  • Dead Skin
  • Pre-Aging Skin
  • Your body’s call for help
  • A Lovely Pre Cancerous Glow
 
Ginger Louviere
Medical Aesthetician

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