When ultraviolet rays are irradiated to the human body, it can promote the synthesis of vitamin D in the human body to prevent rickets. This is the reason why children are often exposed to the sun. Ultraviolet rays also have a bactericidal effect, and wards in hospitals are disinfected by ultraviole

This article will introduce how sunlight affect the product.

This article is mainly talking about the ultraviolet radiation accelerated aging test.

This article is a brief introduction of the operational considerations and the use of the accelerated weathering tester.