Views:21 Author:Site Editor Publish Time: 2020-06-11 Origin:Site
When it comes to hot summer, people are most worried about not only how to relieve the heat, but also how to protect themselves from the sun. Sunscreen is a necessary step in summer, especially for girls, even without makeup, they have to wear sunscreen. Moreover, we should try our best to avoid long-term activities in the hot sun. We must pay attention to protect our skin when going out. We can wear sun hat or sunscreen.
What is UV？
Ultraviolet rays are rays with wavelengths of 10-400 nm in sunlight, and roughly speaking, the ultraviolet rays radiated by the sun can be considered to include UVA, UVB, and UVC.
UVA has a wavelength of 320 ~ 400 nm - long wavelength. It has strong penetrating power and can penetrate most transparent glass and plastic. More than 98% of the long wave ultraviolet rays contained in sunlight can penetrate the ozone layer and clouds to reach the earth's surface. UVA can reach the dermis of skin, destroy elastic fibers and collagen fibers, and tan our skin.
UVB wavelength is 280 ~ 320 nm - medium wave. The shorter part of its wavelength will be absorbed by transparent glass, most of the medium wave ultraviolet contained in sunlight will be absorbed by ozone layer, only less than 2% can reach the earth's surface, which will be especially strong in summer and afternoon. UVB ultraviolet ray has erythema effect on human body, which can promote mineral metabolism and vitamin D formation in vivo, but long-term irradiation will cause skin redness and peeling.
UVC has a wavelength of 100 ~ 280 nm - short wave. It has the weakest penetrating power and cannot penetrate most transparent glass and plastic. The short-wave ultraviolet rays contained in sunlight are almost completely absorbed by the ozone layer.
Natural Sunscree - Isoamyl p-Methoxycinnamate
Isoamyl p-methoxycinnamate is an ultraviolet UVB sunscreen, which belongs to chemical sunscreen and has been approved for use by the European Union. Isoamyl p-methoxycinnamate has better ultraviolet absorption effect than ethyl hexyl methoxycinnamate, and is a sunscreen agent with application prospect. Industry professionals believe that isoamyl p-methoxycinnamate is expected to lead sunscreen into a new era of sunscreen with good results and no allergy.
Sunscreen Principle of Isoamyl p-Methoxycinnamate
As we all know, the ultraviolet rays of sunburned skin are mainly UVA and UVB. Isoamyl p-methoxycinnamate has remarkable absorption effect on UVA, and has the strongest scattering effect on ultraviolet rays (mainly UVA and UVB) with wavelength of 200-400 nm, and has no irritation to human skin and no allergy.
Summary of Sunscreen Knowledge
1. Try to avoid outdoor activities or reduce activity time from 10 am to 2 pm when sunlight is strongest.
2. Avoid exposure to the sun, and pay attention to protection when going out, such as umbrellas, wearing a wide-brimmed hat, wearing long-sleeved clothes.
3. For outdoor use, it is recommended to use sunscreen products with appropriate SPF or PA values.