Three-dimensional shaped article manufacturing method, three-dimensional shaped article manufacturing apparatus, ink set, and three-dimensional shaped article

A three-dimensional shaped article manufacturing apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin, the apparatus comprising:

• a first discharge unit configured to discharge a substantive section-forming ink to a region that forms the three-dimensional shaped article;
• a second discharge unit configured to discharge a sacrificial layer-forming ink for forming a sacrificial layer to a region that is adjacent to a region that forms an outermost layer of the three-dimensional shaped article and on a surface side of the outermost layer, with the substantive section-forming ink and the sacrificial layer-forming ink both including a curing component;
• an energy ray irradiation unit configured to irradiate with energy ray to cure both the substantive section-forming ink and the sacrificial layer-forming ink;
• and
• a controller configured to control irradiation amount and irradiation timing of the energy ray from the energy ray irradiation unit to cure the substantive section-forming ink and the sacrificial layer-forming ink such that a viscoelasticity of the sacrificial layer-forming ink during curing of the substantive section-forming ink by the energy ray irradiation unit is less than a viscoelasticity of the substantive section-forming ink during the curing of the substantive section-forming ink by the energy ray irradiation unit.