[How to choose a sunscreen]
Ultraviolet rays (UV) are divided into three types: "UV-A", "UV-B" and "UV-C". Of these, "UV-C" is cut by the ozone layer surrounding the earth, so "UV-A" and "UV-B" usually reach the ground.
UV-A ・・・Cause of wrinkles and sagging
Penetrates deep into the skin and degenerates collagen, causing wrinkles and sagging.
In addition, UV-A has the property of easily passing through clouds and window glass, so it is necessary to take measures even on cloudy days or indoors.
UV-B: The cause of spots and freckles
The so-called "sunburn" that occurs outdoors is mainly due to this UV-B, which acts on the surface of the skin and causes a red tingling (sunburn) or a darkening of the skin (suntan). UV-B protection is especially important for outdoor leisure activities such as the sea and mountains.
●The numbers on UV care products have the following meanings.
PA : It is a measure of UV-A protection effect. A "+" is added after PA to indicate the difference in effect. Currently, "PA++++" is the best.
SPF : Indicates how long UV-B inflammation can be prevented. The current highest value is written as "50+".
The SPF value is important for so-called “sunburn” care, but the PA value is also important for preventing skin aging and skin damage caused by UV rays.
* This content describes the general characteristics of the ingredients. The efficacy of the product may differ, so please check the product description for details.
The correct way to use sunscreen
〇 Apply after moisturizing
Applying without moisturizing will cause sebum collapse. Apply skin care thoroughly before applying.
〇Apply a sufficient amount
I think that there are many people who dislike thick coating and tend to spread thinly. In that case, the effect will be less than the original SPF and PA values, and you may not be able to obtain a sufficient sunscreen effect. Follow the dosage indicated on the product. You can prevent unevenness and stickiness by applying it in two coats.
〇 Repaint
It's not safe because I painted it properly. Reapply every 2-3 hours as it often comes off with sweat or wipes off with a towel.
■UV scattering agent <br>By reflecting and scattering UV rays on the surface of the skin, the blended scattering agent (powder) prevents the effects of UV rays. Since it is a powder, it has the disadvantage of being relatively white, but it is relatively non-irritating to the skin and has excellent longevity.
■Ultraviolet absorber <br>By converting absorbed ultraviolet rays into energy such as heat on the surface of the skin and emitting them, it prevents ultraviolet rays from reaching the cells of the skin. It has excellent protection against UV rays and is characterized by a good feeling of use, such as less whitening.
However, some ingredients may cause skin inflammation, so it is said that people with sensitive skin should use a type of sunscreen that does not contain UV absorbers.
What is a non-chemical sunscreen?
Sunscreens that do not use UV absorbers are labeled as "No UV absorbers", "UV absorber free", and "Non-chemical prescription". If you have sensitive skin or want to choose a sunscreen that is less irritating, you should choose a sunscreen with this label.
★ Generally, if you want to protect yourself from sunburn, we recommend using a sunscreen that contains a UV absorber.
UV absorbers may irritate the skin depending on the person, but it has high UV protection and protects the skin from UV rays even in places with strong UV rays .
Recently, there is also a type of sunscreen that coats UV absorbers with microcapsules to reduce the burden on the skin by preventing direct contact with the skin.
It is best to choose a sunscreen that matches the location and skin condition , such as using a sunscreen that does not irritate the skin most of the time, and using a sunscreen that has excellent UV protection when going to places with strong UV rays such as the sea or mountains. Sho.
According to the data of the Japan Meteorological Agency, it peaks from May to September . July and August are the months when the amount of UV rays is the highest.
Q2 When is the amount of UV rays high?
Strong UV rays fall during the day from 10:00 to 14:00 . The peak is around noon.
If the amount of UV rays in clear weather is 100%,
Clear weather…………100% UV rays are quite strong. Be careful of direct sunlight and glare from the ground.
Cloudy ………… 60 to 90% Strong UV rays. Even if it's cloudy, it will get sunburnt.
Rain…………30% Ultraviolet rays are weak, but let's not let our guard down.
Even if the sun isn't out, UV rays are pouring down. Especially on cloudy days, you tend to let your guard down, so be careful!
At sea, it is said that UV rays are increased by 20 to 25% due to UV rays reflected from sandy beaches and the sea.
In addition, even in the sea at a depth of 50 cm, about 40% of the ultraviolet rays on the ground surface reach.
It is said that for each 1,000m increase in altitude in the mountains, the amount of UV rays increases by 10 to 12% compared to the level ground.
When you go to the beach or mountains, don't just use sunscreen, wear a hat and clothes to protect yourself from UV rays. Also, the use of sunglasses is effective in preventing the effects of ultraviolet rays on the eyes.
