Archive: https://archive.today/bKnGo From the post: >>In contrast to the success of their molten-plastic cousins, paste extrusion 3D printers have never really attained much popularity. This is shame because, as the [Hand and Machine] research group at the University of New Mexico demonstrate, you can use them to print with some really interesting materials, including glass and eggshell (links to research papers, with presentations in the supplemental materials).