An improved infill printing strategy is described. We propose to use an extremely high temperature on the infill and keep standard recommended extrusion temperatures on the walls, so that the outside visuals of a 3D printed object are kept as close as possible to the standard extrusion process, but with better mechanical properties as an effect of high-temperature infill.
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Konvicny, Jiri, "Infill printing in FFF with extreme temperature", Technical Disclosure Commons, (February 09, 2021)