title: Crystal clear transparent lipstick formulation based on solidified oils.
abstract: We have developed a lipstick, the stick of which looks totally transparent. The base, coloured or not, may contain high concentration of actives or fragrances. The present study examines the process of determination of oils and solidifying agents. The selecting criterion include visible spectroscopic measurements to quantify transparency of the formulated product. We have also validated the stick hardness through drop point and breakage measurements. After several investigations, we selected a mixture of oils and solidifying agents. The oil network obtained has been characterized through optical microscopy, transmission electronic microscopy, X-ray diffraction and differential scanning calorimetry. We can show that the final product we obtained is amorphous and its solidity can be explained by chemical bonds formation.
authors.affiliation: Lancaster Group International Research Center 2, rue de la Lüjernetta, BP 669, 98014 Monaco Cédex.
authors.forename: H
authors.initials: H
authors.lastname: De Clermont-Gallerande
authors.forename: V
authors.initials: V
authors.lastname: Chavardes
authors.forename: L
authors.initials: L
authors.lastname: Zastrow