The national standard ultraviolet band classification refers to the process of classifying and dividing ultraviolet radiation according to international standards.
Ultraviolet light is an electromagnetic wave with a wavelength shorter than visible light but longer than X-rays. Depending on the wavelength, ultraviolet light can be divided into three bands: UVA, UVB, and UVC.
In the Chinese national standard, ultraviolet (UV) bands are mainly divided into the following three categories:
The wavelength range is about 100-280 nanometers (nm), and this part of the ultraviolet energy is extremely high, and has a strong sterilization and disinfection ability.
But under natural conditions, almost all of them are absorbed by the ozone layer in the Earth's atmosphere and rarely reach the ground. Long-term exposure to UVA radiation can lead to problems such as aging, pigmentation, etc.
The wavelength range is roughly 280-315 nanometers (nm), which is the most common band of ultraviolet light that people are exposed to.
UVB stimulates the body's production of vitamin D, which helps promote calcium absorption and bone health. However, UVB can also cause damage, and long-term exposure may lead to health problems such as cancer and cataracts.
The wavelength range is about 315-400 nanometers (nm), UVA has strong penetration, can penetrate deep into the dermis, long-term exposure can lead to aging, pigmentation and relaxation, but it is also a commonly used wavelength band in industrial and scientific research fields such as light curing, UV curing, and fluorescence detection.
The purpose of the national standard ultraviolet band division is to better understand and control the effects of ultraviolet radiation on the human body.
People can choose appropriate protective measures according to the characteristics of different wavelength bands to avoid the adverse effects of ultraviolet radiation on health.
At the same time, researchers can also carry out relevant research according to the division of bands to promote the development and progress of the field of ultraviolet radiation.
The above division is based on international standards and has been widely used in related industries in China.
In specific application specifications and product standards, the ultraviolet bands are further subdivided and defined according to different application scenarios and functional requirements.