Roughness

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Investigation of the homogeneity of the distribution of sunscreen formulations on the human skin:characterization and comparison of two different methods

Investigation of the homogeneity of the distribution of sunscreen formulations on the human skin: characterization and comparison of two different methods  Continuation ...

Importance of Substrate Roughness for In Vitro Sun Protection Assessment 

Importance of Substrate Roughness for In Vitro Sun Protection Assessment

Abstract : The purpose of this study is to demonstrate the influence of plate roughness on well-known absolute or relative UV spectroscopic indices such as the in vitro SPF, in vitro UVA PF (PPD), UVA/UVB ratio, critical wavelength and SPF/UVA PF (PPD) ratio. First a roughness index was measured by non-contact surface topography analysis on different PMMA plates which are available today on the European market  Continuation ...