This document describes research into absorber coatings for use in mid-infrared astrophysics. The researchers created coatings made of epoxy loaded with graphene and glass microspheres, and characterized the materials' dielectric functions and optical properties through modeling and testing. Their coatings were designed to absorb stray light for instruments like SOFIA while withstanding cryogenic temperatures. Modeling showed the coatings had the desired frequency-dependent response, though scattering from microspheres was not fully captured. Further studies measuring optical properties were recommended.