Recycling is often a costly and inefficient process, particularly for objects
composed of multiple integrated materials. Here, we demonstrate a freeform
fabrication system that prints with fully reusable physical voxels and minimal
recycling effort. This new paradigm of digital (discrete) matter enables any
number of materials to be printed together in any configuration. The individual
voxels may then be reclaimed at will by dissolving the bonds holding the structure
together. Coupled with a compatible voxel sorting process, we demonstrate
multiple generations of freeform fabricated objects using the same physical
material. This opens the door to a flexible desktop fabrication process in which
3D multi-material objects are fully recyclable and re-usable with minimal
infrastructure.Mechanical Engineerin
