a novel thermopolymer material adapted for use in thermal stereolithography . more particularly , a thermopolymer material comprising a mixture of : a low shrinkage polymer resin ; a low viscosity material such as paraffin wax ; at least one microcrystalline wax ; a toughening polymer , a plasticizer . alternative embodiments further include components to improve the materials ability to transfer heat and to improve strength . the subject material , together with the described process greatly reduce part building distortions while retaining desirable toughness , strength and jetting properties .