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URL: Breakthrough in clay 3D printing
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3D printing a clay paste that instantaneously cures upon extrusion
An potentially game-changing development in 3D printing clay by scientists at Jiangnan University, China: A 980 nm NIR laser is targeted at a clay slurry as it exits the nozzle (from 0.4 mm to 3.50 mm diameter). At speeds of up to 40 mm/s the extrusion immediately solidifies and cures through photopolymerization. The NIR light penetrates into the slurry and offers drastically improved curing depths over UV light. This enables printing ceramic structures that can be “freely stretched in space without support.”. This turns the paste extrusion printing field upside down, it could mean that clay will be able to create geometries that no other material, or even filament, can. And reduce post-processing workloads and enable use of pastes with higher water content. The process is intuitive, it is inevitable that this will be achieved on consumer devices.
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