The Difference Between Chemical and Physical Sun Protection
Chemical sunscreens contain ingrediants such as Avobenzone (Parasol 1789), Oxybenzone, Ecamsule (Mexoryl), Homosalate, use chemical compounds, which are absorbed into the skin and act as a filter to limit specific wavelengths of solar rays (230nm to 320nm). (See Assay). This is an undesirable consequence (irritation) since the chemicals pass through the skin creating free radicals.
Physical agents, such as Zinc Oxide or Titanium Dioxide, (up to 400nm which include UVA rays) act as an umbrella or metal blanket to reflect and scatter solar rays. Physical agents lay on top of the skin and are not absorbed, avoiding irritation. (See Assay) The new technology relies on the reflective properties of Zinc Oxide or Titanium Dioxide. A physical block is considered a “broad spectrum” (block UVA & UVB) sunblock and is micronized, requires very small quantities to be effective. Physical sunscreens provide instant protection in 15 to 20 minutes wait is not necessary. For all day protection remember to reapply after towel drying. As seen in our Assay our sunscreens block90% or more of the UVA rays at all UVA wave lengths. No other brand we know of is making that claim. Besides been a physical block; aids in skin protection, speeds wound healing, and exhibits antiseptic and antibacterial activity.
Both our ColorShade SPF 30+ and our SolarShade SPF 45 are Physical Sunscreens!!