prepman
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Just noticed on a web search that there is a wax filament for 3D printers. Tricky to use apparently. Not something I've noticed before.
3D Printing with Wax: The Process of Lost Wax Casting
We know all about additive manufacturing by 3D printing. A filament is molten by a hot extruder and deposited on a print bed, and layers are built one by one until the design has been
3dinsider.com