Methods for fabricating objects using investment molding techniques

A method of fabricating an object comprising:

• fabricating a subassembly comprising a plurality of volumes;
• wherein each volume is defined by the homogenous presence or absence of a material;
• wherein fabricating the subassembly comprises using an additive manufacturing process;
• wherein at least one of the plurality of volumes defines a shape that is to exist in the object to be fabricated;
• wherein at least a first of the plurality of volumes comprises a first dissolvable material;
• forming a first cavity within the subassembly;
• wherein the first cavity is adjacent to the first dissolvable material;
• introducing a first additive material into the first cavity;
• dissolving the first dissolvable material subsequent to the introduction of the first additive material;
• wherein the dissolution of the first dissolvable material does not dissolve at least one other material within the subassembly;
• wherein the dissolution of the first dissolvable material results in the creation of a second cavity that is adjacent to the introduced first additive material;
• and
• introducing a second additive material into the second cavity that is different from the first additive material.