The Japanese PA sunscreen rating system

2564836952 e48a6333c7 o The Japanese PA sunscreen rating system

If you’re buying sunscreen from a Japanese brand, you’re likely to come across the PA rating system. 

PA stands for protection grade of UVA system and is the Japanese measurement of sun protection, which is based on the Persistent Pigment Darkening (PPD) reaction reading at 2-4 hours of sun exposure.  According to info from the wiki, the Persistent Pigment Darkening (PPD) method is a method of measuring UVA protection, similar to the SPF method of measuring UVB light protection.

These are the three levels of protection that are commonly seen:
PA+, PA++ and PA+++. 

PA+ provides some UVA protection with a factor of PPD 2-4

PA++ provides moderate UVA protection with a factor of PPD 4-8

PA+++ provides good UVA protection with a factor of PPD > 8

Which means, you’re better off picking a sunscreen with PA+++ which will provide you with the greatest protection.

vivawoman1 The Japanese PA sunscreen rating system © www.vivawoman.net copyright notice
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About Sesame

Blog editor of Viva Woman, Sesame is a skin care addict who is fond of using natural & organic beauty products. She also enjoys ogling at handmade jewelry & cute stationery.

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Comments

  1. Rouquia says:

    Thank you very much for this article. Could you explain the difference between the Persistent pigment darkening (PPD) as described in the JCIA and Persistent pigment darkening (PPD) for the UE, for the UE is the methof based on the JCIA but modified by the AFSSAPS. What is the AFSSAPS has modified in this technic?
    Thank you very much,
    Regards

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  1. [...] European commission and has been adopted by Japan, Korea, and China. Read more about these here, here and here. Hmm, I guess a blog post regarding sun protection must be done soon. *UVA rays [...]

  2. [...] Boyles, Salynn. “High SPF Sunscreens: Are They Better?” WebMD. 21 May 2009. Retrieved 21 Jul 2011. http://www.vivawoman.net/2008/06/09/the-japanese-pa-sunscreen-rating-system [...]

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