Which material increases the opaqueness of cosmetics while also having absorbing properties?

The material that effectively increases the opaqueness of cosmetics while also possessing absorbing properties is titanium dioxide. This compound is widely used in makeup formulations because it provides excellent coverage and helps to create a matte finish, making it ideal for products like foundations and powders. Moreover, titanium dioxide has the capability to absorb ultraviolet (UV) light, providing some level of sun protection when incorporated into cosmetic products.

The absorbing properties of titanium dioxide also aid in reducing shine on the skin, making it beneficial for various skin types, especially oily skin. It is valued for its safety and non-irritating nature, making it suitable for sensitive skin.

In contrast, while precipitated chalk and zinc oxide can provide some opacity, they do not possess the same level of UV absorbing properties as titanium dioxide. Magnesium stearate, on the other hand, is primarily used as a lubricant and thickening agent, rather than contributing significantly to opaqueness or absorption.