 This research paper investigated the feasibility of using recycled high-impact polystyrene hips as a 3D printing material. The study found that hips can be successfully recycled into a 3D printing filament and its mechanical properties remain relatively unchanged after four cycles. Additionally, the density of the recycled hips decreases slightly but the melt flow rate increases significantly. Furthermore, the reprocessing steps have little effect on the quality of the printed products. Overall, the results suggest that recycled hips could be a viable option for 3D printing applications. This article was authored by Edbert Wing-Henicio, Novin Rivky-Lutt-Fiancia, Balkizmentaria Fendi, and others.