 The structural coloring of dental resin-based composites, RBC, is used to create universal chromatic materials designed to meet any aesthetic need, replacing the mixing and matching of multiple shades. These materials are made from a combination of organic and inorganic components, including nanostructures that have a particular arrangement. This arrangement allows for a higher polymer content than traditional RBCs, which are colored by pigmentation. This higher polymer content can affect how the material ages, as it has been shown to be more sensitive to the aging process when compared to traditional RBCs. To assess the effects of aging, accelerated and slow aging processes were conducted in artificial saliva at 37 degrees Celsius for up to one year. The resulting data showed that the accelerated aging process had a much stronger impact on the material's properties than the slower aging process. Additionally, the material's viscoelasticity was found to be more sensitive to the aging process than its quasi-static properties. This article was authored by Nicoletta E. Lee.