What is UV

The natural enemy of beauty – ultraviolet rays
Ultraviolet ray naturally exists in nature. It is a kind of light that cannot be seen by the naked eye. Ultraviolet rays can be roughly divided into UVC, UVB, and UVA according to wavelength. Each wavelength has different harm to the human body. It will also destroy free radicals in the skin and accelerate skin aging. Understanding ultraviolet rays and effectively protecting them is the first step in skin care!

UVC wavelength 100~280 nm. The shorter the wavelength of ultraviolet rays, the stronger the energy contained. The most harmful to the skin is ultraviolet C, but most of it is isolated by the ozone layer in the atmosphere. Only a very small amount reaches the ground. However, in recent years, the ozone layer With constant damage, the harm of UVC to the human body has gradually attracted people’s attention.

UVB wavelength 280~320 nm causes instant sunburn on the skin. Thickening, dullness, redness, eye inflammation, pain and dryness of the skin’s cuticles are mainly caused by UVB. UVB energy is stronger than UVA but easier to protect against.

UVA wavelength 320~400 nm More than 95% of ultraviolet rays are UVA, which has strong penetrating power and causes the greatest damage to the skin. And because it can directly reach the dermis, it promotes skin aging and increases melanin eye inflammation, which is the main factor causing spots. Frequent irradiation will cause the skin to relax, produce wrinkles, and cause capillaries to emerge, causing long-term, chronic and lasting damage. UVA can be subdivided into UVA-2 and UVA-1.

UVA1 has a wavelength of 320nm-340nm. It has deeper penetration than UVB and is more harmful to the skin. It can cause sunburn, redness and pain, actinic keratosis (age spots), and loss of transparency. Mainly UVA -1 caused by.

UVA2 wavelength 340~400 nm belongs to the long wave range, with the strongest penetration reaching the deepest part of the skin, reaching deep into the dermis to tan the skin. It is the most harmful to the skin, but it is also the easiest to ignore, especially in non-summer UVA-1 intensity is weak but still exists, because the accumulated amount over a long period of time is enough to cause skin damage. Especially skin aging and sagging, wrinkles, loss of elasticity, melanin deposition, etc. are caused by UVA-1.