What Does the SPF Number on Sunscreen Mean? | 藥妝百科
![What Does the SPF Number on Sunscreen Mean?](https://i.imgur.com/MEXDLMW.jpg)
2022年3月25日—SPFstandsforsunprotectionfactor.Simplyput,anSPFratingtellsyouhowlongyoucanstayinthesunwithoutgettingburnedwhile ...
![What Does the SPF Number on Sunscreen Mean?](https://i.imgur.com/MEXDLMW.jpg)
SPF[1] stands for Sun Protection Factor. The SPF number indicates the level of protection against ultraviolet (UV) B rays. Sunscreens[2] with a higher SPF offer greater protection from the sun.
SPF refers to the amount of UV radiation it takes to produce sunburn when wearing sunscreen in comparison to how much UV exposure it takes for unprotected skin to get sunburned. But, contrary to popular belief, SPF does not tell you how long you can stay in the sun without getting burned.
This article explains what SPF numbers mean. It discusses how SPF is measured and how to determine the right level of protection for your skin. It also offers advice for other ways to protect your skin from UV ...
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