For multi-colour 3D printing, a regular dual extruder 3D printer, one which incorporates a single mount for the twin nozzles, is good enough. But don’t hope it to become as rapid as a single extruder 3D printer, looking at the additional weight on the print head influences the print velocity. https://data-toto-macau87013.blogdosaga.com/29622721/multicolored-3d-printer-no-further-a-mystery