For multi-shade 3D printing, a regular twin extruder 3D printer, one that encompasses a one mount for the dual nozzles, is good enough. But don’t be expecting it for being as speedy as one extruder 3D printer, looking at the extra weight over the print head affects the print velocity. https://milky-oil60356.ambien-blog.com/36007526/an-unbiased-view-of-multicolored-3d-printer