We have learned about short-wave UVC before, and in this section we also understand medium-wave UVB. Medium wave ultraviolet: referred to as UVB. It is ultraviolet light with a wavelength of 280-320nm. UVB has a certain physiological effect on human skin. A large part of these ultraviolet rays are absorbed by the skin epidermis and can no longer penetrate into the skin. However, due to its high level energy, it can produce strong light damage to the skin, the dermal blood vessels in the irradiated part expand, and the skin can appear redness, blisters and other symptoms. Long-term exposure to the skin can cause erythema, inflammation, and skin aging. In severe cases, it can cause skin cancer. Medium-wave ultraviolet rays, also known as the sunburn (red) band of ultraviolet rays, are ultraviolet bands that should be focused on prevention. Bagging Machine,Middle Seal Bag Making Machine,4 Side Seal Bag Making Machine,4 Side Seal Bag Machine Wuxi Zhengyu Technology Development Co.,Ltd. , https://www.zhengyumachine.com