UV-A (UV-age) are non-visible rays with a wavelength of 400 to 315 nanometers that are present regardless of the weather. These are the rays that penetrate deepest into the skin and are the cause of wrinkles and skin aging. UV-A rays are also responsible for the appearance of pigmentation spots and can cause skin cancer.
UV-B
Les UV-B (UV-burning) sont les rayons ultra-violets responsable du bronzage de la peau. Ils ont une longueur d’ondes d’environ 315 à 280 nanomètres et pénètrent moins profondément dans la peau. En plus du joli teint hâlé, les UV-B sont ceux qui causent les coups de soleil, brûlures et la plupart des cancers de la peau.
UV-C
UV-C is the most dangerous of the sun's rays emitted by the sun. However, thanks to the ozone layer that filters out these rays, we don't have to worry about them.
Infrared
Infrared rays are the rays responsible for the heat we feel when we are in the sun. These rays are the only ones we feel and when they are blocked by clouds we feel like we are sheltered from the sun, which is not true.
La protection solaire idéale
When we are outside, UV rays attack our skin even if we don't notice it. UV-A and UV-B rays pass through clouds and are reflected by sand, water, snow and grass. Also, UV rays are not totally stopped by sunshades, so it is safer to protect yourself with clothes or sunscreen even in the shade.
In addition, the intensity of the sun varies according to several factors.
The closer the summer gets,
The higher the altitude,
The closer we are to the equator.
Lors du choix d’une crème solaireWhen choosing a sunscreen, it is important to check that it protects the skin from both UV-A and UV-B rays. UV-B protection is not sufficient because the skin is not protected from premature aging.
Sun protection for winter sports, the essential accessory
When winter is here, it's time to go to the mountains to enjoy the snow. Skiing, sledding, snowshoeing, walking or just having a drink on the terrace, as soon as the weather is right, everyone takes the opportunity to go out. But whatever the activity, a special winter sport sun protection is necessary.
Indeed, the mountain in winter is dangerous for two reasons:
The snow reflects most of the UV rays (up to 90%) even when the sun is not shining.
In the mountains, the intensity of UV radiation increases by 10% every 1000 m of elevation. It is therefore more violent for the skin than when we stay at home.
Pour se protéger de cet indice UV décuplé, le meilleur moyen reste de se protéger le visage et la peau avec une crème solaire spéciale sports d’hiver à appliquer toutes les heures. Il ne faut pas oublier de se protéger les lèvres avec un baume adapté car elles sont également sensibles aux UV.
Guide to using sun protection
Pendant combien de temps une protection solaire se conserve-t-elle ?
Before applying sunscreen, it is important to check that it has not expired. When the shelf life of a cream expires, it means that the indicated sun protection factor is no longer guaranteed.
On many vials, the expiration date is written on the bottom of the bottle in months (6M, 12M, 18M, 24M). This indicates the storage time after opening the jar.
Quelques conseils pour passer un été sans risques
In summer as in winter, protection of the skin against the sun's rays is essential to keep a beautiful skin all life long. Here are a few tips to follow to spend a summer in the sun.
Choose an SPF (Sun Protection Factor) that is appropriate for your skin. If you are unsure, it is best to choose a cream with an SPF of at least 30.
Be generous when applying and don't skimp on quantity.
Don't forget the ears, neck, feet, hands and lips.
Apply the cream every two hours and after swimming.
Avoid staying in the sun between noon and 3pm. These are the hottest and most dangerous hours for the skin.
Choose a waterproof sunscreen.
Cover your head and neck with a hat or scarf.
Check the expiration date of the cream before applying.
Children and babies have more sensitive skin than adults and should be covered with a hat or scarf to their skin.
At the end of the day, apply after-sun cream or moisturizer to soothe and rehydrate the skin.