“Towards this objective, Harvard researchers have designed new multimaterial printheads that mix and print concentrated viscoelastic inks that allow for the simultaneous control of composition and geometry during printing. Using active mixing and fast-switching nozzles, these novel printheads change material composition on the fly and could pave the way for entirely 3D-printed wearable devices, soft robots, and electronics.”
http://www.seas.harvard.edu/news/2015/09/printing-lightweight-flexible-and-functional-materials?utm_source=facebook&utm_medium=social&utm_campaign=hseas
as it can be make with a arm direct pellet printer
with addition of a big price
IIRC, it’s not new, because @Joshua_Rowley and @Sanjay_Mortimer1 were doing this 6 months ago.
Two years ago now, and with hot thermoplastic too. Cyclops was borne out of those early experiments.