Korean J Dermatol.
2000 Jun;38(6):735-741.
Assessment of UVA protectiveness by Sunscreens with a Protection Factor in UVA(PFA) Test Method
- Affiliations
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- 1Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea.
- 2Department of Dermatology, Samsung Cheil Hospital, Sungkyunkwan University School of Medicine, Suwon, Korea.
- 3Pacific corporation R & D center.
Abstract
- BACKGROUND: Recently, concerns regarding protection provided by sunscreens in the UVA spectrum have been raised. But there is no standard testing protocol for quantifying this protection. OBJECTIVE: As an ideal test methodology, the PFA test using the concept of minimal pigment darkening dose(MPPD) was evaluated to determine its ability to quantify the UVA protection provided by a sunscreen. METHODS: Sunscreen products were tested on unsensitized women subjects with both UVA from a Sellas UVA lamp in a protocol similar to the sun protection factor test(SPF) and UVB by the SPF protocol. RESULTS: The protection factors in UVA ranged from 5.0 to 5.3 depending on the type of absorber and the UVB blocking filter. CONCLUSION: This test method provides a realistic in vivo estimate of the amount of UVA protection provided by sunscreens.
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