creating a color printer that uses a colorless, non toxic ink inspired by nature /

From dot-matrix to 3-D,printing technology has approach a long way in 40 years. But all of these technologies have created hues by using dye inks, which can be taxing on the environment. Now a team reports in ACS Nano the development of a colorless, and non-toxic ink for employ in inkjet printers. Instead of relying on dyes,the team exploits the nanostructure of this ink to create color on a page with inkjet printing.

Source: phys.org