| 20080224059 | Method for Determining an Integral Sun Protection Factor Encompassing Uva and Uvb Radiation - The invention relates to a method for determining an integral sun protection factor (∫SPF or iSPF) which encompasses both UVA and UVB radiation and can be used for classifying cosmetic and dermatological sunscreens. The method comprises the steps of applying a defined amount of the sunscreen onto a defined area of a skin substrate impregnated with a spin trap, exposing the skin substrate to a defined amount of UVA- and UVB rays by a sun simulator, subjecting the skin substrate exposed to radiation to an electron spin resonance (ESR) measurement, recording the number of free radicals trapped as a real number×10 | 09-18-2008 |
