Three independently controlled Bowden extruders deliver a certain percentage of each color filament into the mixing chamber. Percentage for each color could be set by the user, just like mixing color for painting. Then the filaments will be melted and mixed in the unique mixing chamber, and extrude through the nozzle to build an object. You can print most color by mixing the 3 basic colors, Red, Yellow and Blue. Or you can also use other special filaments to make astonishing prints, such as Transparent, Metallic, Wood, or even Carbon fiber filaments. There is no limit to your creativity.