Semi-processed plastics; Acrylic resins, semi-processed; Artificial resins, semi-processed; Semi-processed resins; Synthetic resins, semi-processed; Plastic filaments for 3D printing; Semi-worked PLA filaments for use in 3D printing; Semi-worked thermoplastic filaments used for 3D printing; Semi-worked ABS filaments for use in 3D printing; Semi-worked ABS (acrylonitrile butadiene styrene) filaments for use in 3D printing