A vat, coated with the team's unique resin, is placed over a smartphone so the light hardens the substance onto a print bed above the vat. With every cured layer, the platform slowly rises until the object is fully printed.

This isn't the first mention of a smartphone in the context of 3D printing. Solido3D, an Italian rapid prototyping company, announced a phone-based 3D printer called OLO in October. While the company is yet to reveal how OLO works, Taiwan Tech's 3D printer, which currently lives in the lab, has been able to create a hollow ball that's about 100 microns thick.

Using light from a device that's already in the hands of about two billion people across the world is ingenious. But the device, irrespective of the maker, doesn't provide the power to match the production levels of other 3D printing machines just yet. "As you know, the power of light on a smartphone is very low, so our print speed is still relatively slower than other vat polymerization machines now, but we are working hard to solve this problem and seem to getting promising results recently," research assistant Hanhsuan Lee told 3D printing industry. "However, there is a professor at Taiwan Tech, that has developed a DLP printer that can print a layer every two seconds. And we are working on a process for making the smartphone light more powerful."