Читать книгу Surface Science and Adhesion in Cosmetics - Группа авторов - Страница 41

De Clermont-Gallerande et al. [33] reported the roles of oil viscosity and wax amount in the lipstick formulation on the mechanical properties of the lipsticks. By varying the oil viscosity or wax amount or wax type, they could control the hardness and the deposit of the lipstick which affect the sensorial perception. For example, the use of a highly viscous oil in the synthetic wax - polyethylene - polypropylene/ethylene copolymer (T_m = 82⁰ C) increases both the breaking resistance and the thickness of lipstick compared to low viscosity oil. Using DSC, Abidh and coworkers also confirmed the strong impact of the oil viscosity on the wax crystal network which influenced the mechanical and sensorial properties of model lipsticks in a recent publication [34].