Quantified evaluation of spreadability of cosmetics using their rheological properties = Quantified evaluation of spreadability of cosmetics using their rheological properties

다국어 초록 (Multilingual Abstract)

This presentation is about rheology properties about viscoelastic complex fluid especially for ‘foundation cosmetics’. Foundations, lotions and shampoos are examples of commonly used cosmetics. These kind of cosmetics have both viscous behavior(like-liquid) and elastic behavior(solid-like). The point where stress relaxation occurs, their properties change depending on applied shear rate. When people apply cosmetics on their skin, high shear rate makes material’s viscosity change. Using these rheology properties, it is possible to quantify and define spreadability of cosmetics in rheological definitions. Moreover, it can provide useful evaluation criteria of foundation cosmetics and contribute on developing new products on cosmetic industries.