Stability and Application Properties of Surfactant-Free Cosmetic Emulsions: An Instrumental Approach to Evaluate Their Potential

In order to formulate an oil-in-water fluid emulsion stabilized by the combination of organic and inorganic powders namely Zea mays starch and zinc oxide, and to test viscoelastic characteristics and the parameters of its textures such as firmness, consistency, and adhesiveness, researchers conducted multiple mechanical stress test in a centrifuge. They concluded that the formulation was suitable for adding in skin-care products with low viscosity and high spreadability. The compatibility of the powders with sunscreen filters and pigments was also studied to optimize the systems and assess their potential use in finished products.