本发明提供一种柔版印刷用金属奈米粒子印墨，其系含有金属奈米粒子(A)及有机化合物(B)之复合体、与包含水及碳原子数1~3的单醇之水性介质(C)的柔版印刷用金属奈米粒子印墨，其特征为前述水性介质(C)中之碳原子数1~3的单醇(monoalcohol)之含有率为45质量%以上。该印墨系在印刷于难以吸附溶剂的基材时，不易发生印墨排斥，可制造安定、精度高且均匀的图案。

The present invention provides a metal nanoparticle ink for flexography characterized by containing: a composite of metal nanoparticles (A) and an organic compound (B); and an aqueous medium (C) containing water and a monoalcohol having 1-3 carbon atoms, wherein the content of the monoalcohol having 1-3 carbon atoms in the aqueous medium (C) is 45 mass% or more. When the ink is printed on a base material which to a great extent does not absorb a solvent, the ink is less likely to be repelled and a uniform pattern can be stably produced with high precision.