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What is the difference between SPF and PA?

April 26, 2017difference PA SPF

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What is the difference between SPF and PA?

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The SPF (Sun Protection Factor) shows the products ability to protect the skin from UVB (rays that burn). The higher the SPF, the more effect it has in defending against UVB. Shiseido developed a unique PA rating system to show the level of protection against UVA rays (aging rays), with the highest index being PA+++ as extremely effective protection. [top] 15.