▎ 摘　　要

NOVELTY - Producing ink, comprises (a) preparing source solution by mixing graphene oxide or metal salt with first solvent, (b) increasing viscosity of the source solution to produce gel source, (c) dissolving polymer in the gel source, and (d) heat treating the gel source in which polymer is dissolved, and removing first solvent. USE - The ink is useful for three-dimensional printing of pattern structure (claimed). ADVANTAGE - The method is simple and economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) producing pattern structure, comprising (i) producing three-dimensional printing ink, (ii) preparing a preliminary pattern structure using the ink through three-dimensional printing method, and (iii) irradiating the preliminary pattern structure with extreme ultraviolet-white light; and (2) ink comprising graphene oxide, metal salt and 0.44 wt.% polymer.