Heidelberg University researchers developed a 3D printing resin that a chemical trigger can break down into its molecular building blocks within seconds at room temperature, allowing the material to be remade into polymer and reused. The recycled material retained the original’s molecular composition and properties, pointing to a possible future where your high-resolution resin prints could be recycled into new printable material instead of discarded.

There's no website yet, no real photos, and scarce details, but if you're planning to attend Formnext Asia next week, wander by the AxiLoop booth in Hall 15, Stand D193, and see if its “8-spool, 8-toolhead” MC8 is actually a thing. Shenzhen-based AxiLoop has been teasing the MC8 only on social media. It's said to be a 300 x 300 x 300-mm multicolor machine with automatic filament loading and unloading, app control, and a claimed 10x reduction in waste. So far, that's it. If it's a thing, we'll let you know.

Forget batteries and motors: researchers at the MicroBioRobotic Systems lab at France's EPFL 3D printed tiny robots that fly on sound. Each microflier contains tiny air-filled cavities that work a bit like a bottle when you blow across its opening: hit it with the right frequency the trapped air starts vibrating strongly enough to thrust the robots airborne and enable researchers to steer them remotely. The robots were resin 3D printed using two-photon polymerization tech on a Nanoscribe Photonic Professional GT+.

our lithophane coverage this week led us to wonder how much these projects are in demand, especially now that they're easier than ever, and full-color is an option. If you haven't made one, what's holding you back?