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Like almost everyu00a0FDM 3D printer, a 3D printing pen is also equipped with a heating head and requires filaments as its main material to any 3D printing creation. By heating the filament up, the material will just be melted and can be extruded from the penu2019s nozzle. As the melted filament comes out from the head of the pen, it will cooler down quickly and hardens and hold whatever shape you have worked it into.<br>
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