When 3D printers introduced, the one alternative was photosensitive resin. But as 3D printing technological know-how has progressed, multiple materials and selections have come into the image. Reply: Dual extrusion requires a 3D printer with two extruders, each loaded with its have filament, allowing for for different materials or colours https://vasilievichb801odr9.onzeblog.com/29777402/top-multicolored-3d-printer-secrets