Three dimensional (3D) printer and rapid prototyping (RP) systems are currently used to quickly produce objects and to prototype parts using CAD tools. Most RP systems use an additive, layer-by-layer approach to building parts by joining liquid, powder, or sheet materials to form physical objects. Some of these RP systems through selective laser sintering amalgamate materials by heating them with lasers to generate 3D printed objects. Researchers at the University of California, Irvine have created a new 3D printer with improved selective laser sintering. The new 3D printer and process varies the composition of the materials in a 3D printed object thus creating an object with enhanced strength, conductivity, heat resistance and other enhancing properties.