Researchers at the University of Texas at Austin, working with Sandia National Laboratories, have developed a novel 3D printing method called CRAFT (Crystallinity Regulation in Additive Fabrication of Thermoplastics) that lets a single inexpensive material be tuned at the pixel level to produce different mechanical and optical properties within one object. By precisely controlling light intensity during printing, CRAFT can make parts of an object hard and transparent while adjacent regions stay soft and flexible, mimicking the variety of textures found in real human tissues like skin, ligaments, tendons and bone.
Using this technique with a standard affordable 3D printer, the team successfully printed a realistic model of a human hand from one feedstock that captures these varying properties without needing multiple materials. This innovation could have significant practical applications, especially in medical training and education. Because traditional cadavers are costly, ethically complex to source, and don’t reflect the feel of real human tissue, CRAFT-printed models could offer a cheaper, more realistic alternative for students to practice on. Beyond medical use, the process may also be applied to making bioinspired materials for things like impact-absorbing gear or soundproofing.
More information:
https://interestingengineering.com/science/us-researchers-3d-print-realistic-human-hand