日焼け止めを買う前に！知っておくと便利なSPFとPA
今の季節、日焼け止めを塗るのはお肌を守る常識。でも日焼け止めのパッケージに書いてあるSPFやPAが何を意味するか、知らない人も多いのでは？SPFとPAとは紫外線をブロックする効果を数値に置き換えて表しているものです。知っていると、自分の肌質や状況に合わせて選べますので、覚えておくと便利です。
その前に紫外線は、波長が長い順番にAからCの3種類、UVA、UVB、UVCに分類されます。
Rating
50
Translation / English
- Posted at 07 Jun 2012 at 15:57
Before you buy a sunscreen! Bits of knowledge of SPF and PA
Everybody knows we should protect our skin with sunscreen around this season. But I guess most of you don't know the meaning of SPF and PA written on the package. SPF and PA shows its UV protection effect in number. It is useful if you know the meaning of them to choose the good one for your skin or condition.
First of all, UV is categorized into 3 types, from A to C :UVA, UVB, UVC in order of longer wavelength to less.
Everybody knows we should protect our skin with sunscreen around this season. But I guess most of you don't know the meaning of SPF and PA written on the package. SPF and PA shows its UV protection effect in number. It is useful if you know the meaning of them to choose the good one for your skin or condition.
First of all, UV is categorized into 3 types, from A to C :UVA, UVB, UVC in order of longer wavelength to less.
Rating
53
Native
Translation / English
- Posted at 07 Jun 2012 at 17:07
Read before you buy a sunscreen! Something to note about SPF and PA.
Now is the season to protect your skin by applying sunscreen. However, how many people are aware of the meanings of labels they see on sunscreen packaging like SPF and PA? SPF and PA numbers indicate the sunscreen's effectiveness against UV rays.
By understanding its meaning, you will be able to select the best sunscreen appropriate for your skin type and situations.
First, it is important to know that UV rays are categorized into 3 types depending on it's wavelength. The types of UV rays from longest to shortest wavelength are UVA, UVB and UVC.
Now is the season to protect your skin by applying sunscreen. However, how many people are aware of the meanings of labels they see on sunscreen packaging like SPF and PA? SPF and PA numbers indicate the sunscreen's effectiveness against UV rays.
By understanding its meaning, you will be able to select the best sunscreen appropriate for your skin type and situations.
First, it is important to know that UV rays are categorized into 3 types depending on it's wavelength. The types of UV rays from longest to shortest wavelength are UVA, UVB and UVC.
