This paper cites that one in its first paragraph: "Until now, only two ways to shape glass in a 3D printing process have been demonstrated: a fused deposition

This paper cites that one in its first paragraph: "Until now, only two ways to shape glass in a 3D printing process have been demonstrated: a fused deposition moulding approach in which soda lime glass is heated to around 1,000 °C and a manual wire feeding approach in which a glass filament is melted using a laser beam [6,7,8]. In both cases, coarse structures with high surface roughness are obtained." The paper you mention is reference number 6. This new paper apparently significantly improves upon resolution and quality. The press release is a bit confusingly worded, referring to "extremely small and complex structures" made of glass. Those haven't been 3D-printed before. The paper (probably requires a Nature subscription): http://www.nature.com/nature/journal/v544/n7650/abs/nature22061.html http://www.nature.com/nature/journal/v544/n7650/abs/nature22...