Abstract: The present invention includes methods of three-dimensional printing as well as the high density and/or radiopaque three-dimensional articles produced thereby. Articles prepared in accordance with the method of the present invention may be used as production articles or as prototypes to be able to demonstrate the shielding characteristics of shaped articles in instances where production articles may later be produced by injection molding. The method of the present invention may be carried out using fused deposition modeling or selective laser sintering methods known and used in the art.