Take pearlescent pigments as an example, pearlescent pigments are a class of pigments with pearl luster, which are deposited on the substrate (generally natural mica, synthetic mica, glass sheet and other sheet-like materials) above a layer or alternately deposited multiple layers of metal oxides or non-metallic oxides and formed a flat sandwich body with a structure similar to sandwich. Due to the difference in refractive index between the substrate and the oxide deposited on its surface and each oxide, when the light shines on the surface of the pearlescent pigment, the incident light will be refracted and reflected at the interface of each layer of the pearlescent pigment, and the color of the pearlescent pigment that people see is the result of the superposition of light after multiple refractions and reflections of the light, that is, the interference phenomenon of light.

In conclusion, mica powder plays a crucial role in the cosmetics industry, providing not only aesthetic appeal but also functional benefits. Its applications span a wide range of products, enhancing everything from foundation to body shimmer. However, as the industry evolves, it is essential for consumers and manufacturers alike to prioritize ethical sourcing and sustainability. By doing so, we can enjoy the beauty and benefits of mica while supporting fair practices and the welfare of workers in the mica supply chain. As we continue to navigate the complexities of ethical beauty, the sparkling allure of mica powder will undoubtedly remain a beloved component of cosmetic formulations.