Semi-crystalline and amorphous materials via multi-temperature 3D printing from one formulation.

Summary: Imagine printing a plastic tool that is hard in some spots and flexible in others, but using only one type of ink! Usually, 3D printers need several different inks to do this. But scientists have created a special new liquid ink. By simply changing the heat and light on the printer as it works, they can make the printed object clear or cloudy, stiff or bendy. This amazing trick can be used to make shape-shifting materials or even hide secret messages inside the plastic!