Aspects of the disclosure relate to a method of forming an article including: combining first and second chemical components that are reactive with each other to form a coreactive composition; depositing the coreactive composition to form a conductive portion of an article; wherein, 48 hours after depositing, the conductive portion comprises: a tensile modulus of at least 5 MPa; and an electrical conductivity of at least 2 S/m; wherein the coreactive composition comprising: a solvent content less than 5 wt %; and a conductive filler content effective for the conductive portion to reach the electrical conductivity of at least 2 S/m.

Provided is a stereolithographic resin composition that suppresses sedimentation of the filler during shaping, has good handleability, and has high thermal conductance of the cured product. A stereolithographic resin composition containing a photocurable resin and a filler, wherein the filler is a metal-coated particle having a base particle including a polymer material and having a metal layer coating the surface of the base particle, and a density of the metal-coated particle is 1.5 g/cm.sup.3 to 4.0 g/cm.sup.3.