Color gradient filament is fun stuff to play with. It lets you make 3D prints that slowly fade from one color to another along the Z-axis. [David Gozzard] wanted to do some printing with this ...

However, they can be programmed with a variety of gradient index (GRIN) structures including diffractive and refractive lenses. The polymers self develop in respnse to light, enabling complex 3D GRIN ...

a) Scheme for one-step AMMP to print both UGI and functional devices. b) Schematic illustration of the original and stretched states of a 3D gradient UGI. Young’s modulus distributions of the UGI and ...