Changing colors during a 3D print is notoriously difficult ... are as smooth an effortless as this one which uses erasable pen ink to add colors to the filament on the fly. Erasable pen ink ...

Walls in many homes play host to art prints or family photos ... The image is then reproduced on the 13.3-inch E-Ink display a few seconds later. The display leverages Spectra 6 color ePaper ...