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- Title
Brief communication Sun protection factor determination in vivo using a single exposure on sunscreen-protected skin.
- Authors
Diffey, Brian L.
- Abstract
Determining sunscreen sun protection factors (SPFs) in a cohort of volunteers, particularly on products designed to provide high levels of protection, can be time-consuming. The conventional approach is to administer to each subject a series of exposures (normally between five and seven) on their sunscreen-protected skin. A method, based on Gaussian statistics, is proposed that requires just a single exposure on the sunscreen-protected skin in volunteers to arrive at a reliable estimate of the mean SPF of a test product. The method is shown to yield an estimate of a product's mean SPF that is comparable, or better, in accuracy to estimates obtained by conventional multi-exposure testing.
- Subjects
SUNSCREENS (Cosmetics); VOLUNTEER service; SAFETY; STATISTICS; COSMETICS
- Publication
Photodermatology, Photoimmunology & Photomedicine, 2003, Vol 19, Issue 6, p309
- ISSN
0905-4383
- Publication type
Article
- DOI
10.1046/j.1600-0781.2003.00057.x