For multi-color 3D printing, a regular twin extruder 3D printer, one which incorporates a single mount for the twin nozzles, is sufficient. But don’t anticipate it to get as quick as a single extruder 3D printer, taking into consideration the additional bodyweight on the print head affects the print speed. https://edwinpmfcy.blogtov.com/10166076/the-definitive-guide-to-multicolored-3d-printer