In vitro prediction of sunscreen PFA values

Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations

Reexamination Certificate

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Details

C424S060000, C424S400000, C424S401000, C600S407000

Reexamination Certificate

active

07033577

ABSTRACT:
An in vitro method for the prediction of in vivo UVA protection by a composition with sunscreen properties. The method includes the steps of: determining in vivo SPF; determining in vitro SPF based on the sunscreen's absorbance spectrum in the UV region; normalizing the absorbence spectrum based on integration area of UVA1; and calculating the PFA-PPD in vitro.

REFERENCES:
patent: 6820014 (2004-11-01), Ferrero et al.
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JCIA Technical Bulletin, JCIA Measurement Standard for UVA Protection Efficacy. Issued Nov. 21, 1995.
Chardon A, Moyal D, and Hourseau C. In: Lowe NJ, Shaath NA, Pathak MA eds. Sunscreens: Development, Evaluation and Regulatory Aspects, New York: Marcel Dekker, 1997: 559-582.
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DGK (German Society for Scientific and Applied Cosmetics)—Task Force “Sun Protection”. IFSCC Magazine 2002; vol. 5, No. 3: 161-166.
http://www.labsphere.com/tech—info/docs/SPF—of—Sunscreens.pdf.
IMS Seminar Series. 2001 SCC Florida Chapter Sunscreen Symposium. Apr. 25, 2002.

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