Transforming Favorite Lipsticks into Long-Lasting Products Using an Over-Coating Film

Abstract

Each year, customers seek new lipstick products that meet their unique preferences and match rapidly changing fashion trends. They also seek products that are long lasting and do not smear, an effect that can destroy the color and texture of the lipstick and ruin its impression. Reapplying a smeared lipstick is also time-consuming and inconvenient. One common approach to developing a long-lasting, non-smearing lipstick product is using volatile oils and film-forming agents to create a thin film on the lip surface. Another approach is to use a polyethylene glycol or glycerin-modified silicone oil to create a lipstick comprising of a moisture gel that matches the natural moisture in the lips. However, both approaches are limited in terms of the colors and textures they can offer, making it difficult to balance functionality with customer preferences. In this research, we addressed the challenge of creating a long-lasting, non-smearing lipstick through the development of a novel lipstick overcoat that can be applied over any traditional lipstick product, greatly improving its long-lasting effect while having no impact on its color or texture. Our results revealed that a smooth, highly transparent lipstick coating with strong secondary adhesion-less effects could be developed using fluorine-modified silica as the gel film powder, a fluorine-modified silicone cross-polymer as the material for improving the usability, and a fluorine-modified silicone oil as the oil-repellent solvent. Usability tests showed that our developed overcoat could be easily applied over existing lipstick products giving them greatly improved long-lasting properties, with no change in the lipstick color (⊿E*≤1.3) or texture after application, while at the same time greatly reducing the chances of smearing. An interpersonal impression evaluation confirmed that our lipstick technology allowed users to continue enjoying the impressions created by their favorite lipsticks.