Look, smart women always protect themselves from the sun like this, because they know that sunscreen is the most economical skin care product.
Don't pave the way, just get to the point.
If you want to be lazy, you can look at the answers under each question. )
Do you need sun protection? Yes! Men, women and children should be protected from the sun, and pregnant women should also have three kinds of ultraviolet rays, UVC, UVB and UVA. UVC of short wave is the most destructive, but it can't penetrate the ozone layer. Only residents in the ozone hole area need to be extra careful. UVB can cause erythema, DNA damage and skin cancer. UVA can damage the collagen and elastin of the skin, leading to wrinkles and aging.
Sun protection is to protect the skin from the sun's ultraviolet rays, especially UVB and UVA.
Applying sunscreen belongs to soft sun protection, and sun umbrellas, sunglasses and sun protection clothes are called hard sun protection. Applying sunscreen is only a part of sun protection, and hard sun protection has a larger area and better effect, which should attract enough attention.
Children have delicate skin, pregnant women are in a special state, and the elderly are more likely to get skin cancer. These three people should be hard and choose hard sun protection carefully.
How to choose a sunscreen umbrella? Choose UPF30-50, with large umbrella cover, vinyl coating, thick fabric, light and firm support and high UPF value, which can not only better protect against sun and block ultraviolet rays, but also have good heat insulation and cooling effect. When the UPF value of umbrella is 30, the ultraviolet filtration can reach 95%. When the UPF value reaches 50, the ultraviolet filtration reaches more than 98%.
In our daily use, it is enough to use an umbrella with UPF value of 30 to protect us from the sun.
UPF, called UV protection coefficient, is an objective standard to measure the damage of ultraviolet rays to skin. UPF refers to the ratio of the average effect of ultraviolet radiation calculated when the skin is unprotected to the average effect of ultraviolet radiation calculated when the skin is protected by textiles. It can also be understood as the ratio of the time threshold required for ultraviolet radiation to reach a certain degree of damage (such as erythema, eye injury and carcinogenic critical dose) after textile protection to the time threshold required for reaching the same degree of damage without textile protection.
If UPF is 25, it means that 1/25 ultraviolet rays can penetrate textiles. Similarly, UPF is 50, which means that 1/50 ultraviolet rays can penetrate textiles.
Therefore, the higher the UPF value, the less ultraviolet rays the product can penetrate, and the better the anti-ultraviolet effect.
China's standard "Evaluation of Ultraviolet Resistance of Textiles" (GB/T 18830-2002) requires that the tested textiles can only be labeled as ultraviolet-resistant products when their UPF value is greater than 30. When the UPF value is greater than 50, it is marked as 50+, and when 40 < UPF ≤ 50, it is marked as UPF40+. This standard is applicable to any textile, but it is required to indicate that "long-term use and use in a stretched or wet state will reduce the ultraviolet resistance".
Coated fabrics are divided into colored glue, silver glue and black glue. No matter which fabric is used for sunshade with sunscreen coating, the effects of ultraviolet filtering, heat insulation and waterproof are obviously improved after adding sunscreen coating.
Among them, vinyl is the first choice.
Do you want to buy a sunscreen? The UPF value of casual ordinary clothes is 30+. Without special outdoor work, long-sleeved shirts and T-shirts are enough for daily sun protection.
Of course, the sunscreen clothing marked UPF50+ has the best performance. But the fabric of many clothes itself has the function of blocking ultraviolet rays. Polyester is superior to silk, and silk is superior to cotton, nylon and acrylic. At the same time, color is also very important. Deep red and navy blue fabrics have good radiation protection effect, while light color clothes have poor ultraviolet protection effect. Bright white cotton clothes often contain fluorescent whitening agent, which will reflect harmful light to unprotected face.
Of course, sunscreen clothing has the functions of breathability, quick drying, windproof, waterproof, ultra-light, ultra-thin and self-portrait, which are not available in ordinary clothes. You can buy it if you want.
What should I pay attention to when buying a hat? Loose, breathable, beautiful and strong ultraviolet rays will destroy the hair structure, cause protein degeneration and accelerate the loss of protein. Without protein, hair can't keep moisture. Therefore, after exposure, it is easy to cause hair damage, melanin outflow, red hair, yellow hair, fragility and bad temper. Scalp heat damage will become particularly dry, easy to make hair fall off. Therefore, it is very important to choose a big hat to protect hair and scalp. However, if it is airtight for a long time, sweat and sebum will increase, which will easily cause scalp inflammation and produce a lot of dandruff. So the hat should be loose and breathable.
As for looking good and not explaining it, you don't want an ugly hat to see people at all.
Do you want to buy a sunscreen mask? If you are not afraid of covering acne and prickly heat, you can buy a sunscreen mask. The ultraviolet rays reflected from the ground and low environment will not exceed 10%, so if you have a good sunscreen umbrella and hat, there is no need to buy it.
If you choose a mask with the same mysterious shape as the one below, it will be quite laborious to wear clothes that are either not particular or particularly particular.
Sunglasses are a street tool. Just buy sunglasses and choose a brand. Choose a brand of UV400 sunglasses that matches your face, hairstyle, earrings, necklace, makeup, coat, skirt, shoes and socks ... In short, fashion is the king of choosing sunglasses, and handsome, cool and dazzling are the gold standard of choosing sunglasses.
Soft sunscreen, choose sunscreen, sunscreen oil, cream, spray, gel, powder, stick and ball. Look at several parameters: SPF, PA, waterproof, comfort and price.
Children and pregnant women should choose special physical sunscreen as much as possible. Although it is easy to make their faces as white as lead powder, and especially easy to rub off and be brushed off by sweat, safety is the first priority and must be made up.
Men's sun protection can't be ignored in particular, because men are more sensitive to sunlight. Men over the age of 50 are twice as likely to develop skin cancer as women, and the mortality rate of men suffering from skin cancer is much higher than that of women.
The famous Wolverine Hugh Jackman got skin cancer and got a knife, as if Nicholas Tse also said he had it.
SPF and PA values are not as high as possible. The higher the values of these two sun protection indexes, the stronger the protection ability of sun protection products against ultraviolet rays. However, do you really need such strong sun protection?
For example, if you are a fat house, you can't even get out of your room every day in time for the summer vacation. In addition to watching dramas and playing games without radiation, you can choose broad-spectrum sun protection and physical sun protection with the lowest index.
However, if you want to cross the desert in dog days, or pick up garbage in the deserted Gobi desert, you will sweat like rain at high temperature every day, so the super high SPF and super waterproof ability are the special considerations when you buy sunscreen.
If you go to a tropical island and swim in the seawater of coral reefs and turtles, you should not only consider the waterproof function of sunscreen, but also apply it regularly, at least once every two hours. Don't wear sunscreen when diving. There is no ultraviolet light on the seabed.
Therefore, the use of sunscreen needs to match the scene. Just like different occasions need to wear different clothes. It may make sense to go out drinking with friends in the middle of the night and wear mink. Wearing a suit is really inappropriate.
You don't need to change products frequently to buy sunscreen. Choose one that meets the standard, is comfortable to use by yourself, and is the most expensive in the range of psychological tolerance. Just keep using it.
Sunscreen is too complicated.
So there are still a few words to say.
Apply early
Apply sunscreen 20-30 minutes before going out.
That's enough
The dosage of sunscreen is 2 mg/cm? , about 1 yuan coin size. Spraying needs more quantity and needs to be replenished frequently.
Be diligent
Once every 2 hours on average. It may take more time to use physical sunscreen.
Waterproof should be suitable.
The stronger the waterproof performance during the day, the more difficult it is to clean at night. Some beautiful women have obsessive-compulsive disorder of washing their faces. Too waterproof sunscreen will wash your face. There is too much sunscreen. You'd better use cleansing oil to remove makeup.
Which country did you choose?
Japanese people like to use zinc oxide and alcohol. The skin feels good, but alcohol can irritate sensitive skin, so pay special attention to the ingredients when buying Japanese products.
European products are famous for their high protection. My classmate went to the plateau with a French brand of sunscreen. After using it, he felt very good. When he came back, Amway gave it to everyone. If the sunscreen composition is high, the skin feeling will be weak, and the thick and greasy texture is an inevitable defect of European products.
Sunscreen is an over-the-counter (OTC) product in the United States and is strictly regulated by the FDA. Therefore, there is not much room for American manufacturers to toss about the formula of sunscreen products, and it has been difficult to innovate for many years, and the days are particularly sad. Japanese sunscreen made in the United States is likely to have a completely different formula from Japanese products. If you like Japanese refreshing, try not to change the same brand products in the United States, sometimes the difference is really great.
Can last year's sunscreen still be used after one year?
Look at the shelf life first. If the shelf life fails, even if the sunscreen ability drops after one year, it will not deteriorate as quickly as wine. Don't worry about using sunscreen for too long, unless you like the new and hate the old, you have to buy a new bottle.
Sunscreen and cosmetics
Sunscreen needs to be coated on the skin surface to form a film to play its role. So make-up should be applied to the surface. If the makeup in the sea is gone, you need to wash your face to make up for sun protection, and then put on makeup outside. If the makeup is still there, you need to put on a little makeup, just replenish sunscreen powder or sunscreen powder, and you don't need to start all over again.
How to repair after sun exposure?
First of all, you should have the idea that your skin will be hurt after sunburn. It is no good to rush to use whitening and anti-aging products when the skin is tanned, or even yell at the laser. Use soothing, calming, hydrating and gently repairing products to give your skin time to recuperate. Special reminder: after the skin is red, swollen and painful, you can't use ice cubes to cool down. If the temperature is too low, it will cause frostbite and double skin damage.
In short, no sunscreen product can make people 100% satisfied. Since all the manufacturers didn't give me money, I won't recommend any specific products.
Tell everyone the truth and principles, and slowly find a more suitable sunscreen program.
Tip at the end of the article:
Going out in summer, the road must be special! Special! Special! Pay attention to sun protection! Otherwise, it will really peel a layer of skin!
Dr. Shi Lei, Plastic Surgery Hospital, China Academy of Medical Sciences