An innovative microstereolithography system, developed by the authors of this recent Optical Materials Express article, allows multi-material (color) 3D printing. An interesting approach of providing arbitrary multi-material 3D printing in this article is the exchange procedure of the materials. The system is composed of a simple setup: a glass palette that stores multiple droplets of resins and a solvent tank for the development process. By using this fabrication system, multi-material 3D microstructures can be made without contaminating the resins. Additionally, this technique does not need a material storage bath, and the amount of resin waste was minimized.
This unique microstereolithography can be expected to work as an advanced style of multi-material 3D printing together with other 3D printing techniques.
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