For multi-color 3D printing, a regular twin extruder 3D printer, one which includes a solitary mount for the dual nozzles, is ok. But don’t anticipate it to generally be as rapid as just one extruder 3D printer, thinking about the additional weight over the print head affects the print speed. https://juliee394bfx6.life3dblog.com/29085746/multicolored-3d-printer-can-be-fun-for-anyone