Both UVA and UVB are one of two specifications compared by UV Accelerated Weathering Tester manufacturers. UVA and UVB are a band that divides ultraviolet wavelengths according to different biological effects.
1. UVA band
UVA band: wavelength 320-400nm, also known as long-wave black spot effect ultraviolet light, it has strong penetrating power and can penetrate most transparent glass and plastics, and more than 98% of long-wave ultraviolet rays contained in sunlight can wear Through the ozone layer and clouds to reach the earth's surface. UVA can reach the dermis layer of the skin, destroy elastic fibers and collagen fibers, and tan our skin. Through the above brief description, you can probably understand some basic common sense and principles. I believe that in the future use process, everyone will have an operational awareness.
2. UVB band
UVB band: wavelength 275-320nm, also known as medium wave erythema effect ultraviolet light, medium penetrating power, its shorter wavelength part will be absorbed by transparent glass, most of the medium wave ultraviolet light contained in sunlight is absorbed by the ozone layer, only Less than 2% can reach the surface of the earth, which is especially strong in summer and afternoon. UVB ultraviolet rays have an erythema effect on the human body, which can promote the metabolism of minerals and the formation of vitamin D in the body, but long-term or excessive exposure will tan the skin and cause redness and swelling peeling.
The above information comes from the QINSUN testing instrument team. For the UV Accelerated Weathering Tester Price, please leave us a message!