From dot-matrix to 3-D, printing technology has come 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 ...

Three-dimensional printing has come a long way since the first 'rapid prototyping' patent was rejected in 1980. We've evolved from basic designs to a wide range of highly-customizable objects. Still, ...