Three-dimensional printing

Abstract

Examples of a three-dimensional (3D) printing method are disclosed. In one example method, an intermediate object is generated by i) forming a build material layer with build material particles, ii) based on data derived from a digital 3D model, applying a binder agent to at least a portion of the build material layer, the binder agent consisting of polyfurfuryl alcohol dissolved in an organic solvent, iii) evaporating the organic solvent and precipitating the polyfurfuryl alcohol out of solution by heating the build material layer to a first temperature, thereby binding the build material particles with precipitated polyfurfuryl alcohol in the at least the portion of the build material layer, and iv) repeating the spreading, selectively applying, and the heating steps. A carbon residue is then produced from the precipitated polyfurfuryl alcohol throughout the intermediate object by heating the intermediate object to a second temperature.

Dependencies are inferred from the claim text.