Assessment of UVA protectiveness by Sunscreens with a Protection Factor in UVA(PFA) Test Method.
- Author:
Hong Suk KIM
1
;
Hyun Joo CHOI
;
Soo Min KIM
;
Jong Il KIM
;
Seung Kyung HANN
Author Information
1. Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Ultraviolet A;
Sunscreen;
Minimal pigment darkening dose
- MeSH:
Female;
Humans;
Sun Protection Factor;
Sunscreening Agents*
- From:Korean Journal of Dermatology
2000;38(6):735-741
- CountryRepublic of Korea
- Language:Korean
-
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.
