Semi-processed photo-curable synthetic resin for 3D printers; stuffing materials in the nature of plastic wadding for 3D printers; raw rubber for 3D printing; acrylic resins, semi-processed for 3D printing; semi-processed synthetic resins for 3D printing; raw or semi-worked gum for 3D printing; plastic filaments for 3D printing; synthetic rubber for 3D printing; artificial resins, semi-processed; semi-processed thermoplastic synthetic resin filament for printing