That is the resolution tradeoff with this particular method. Each needle would be fed from a tube connected to its own control valve. Non bound material would a

That is the resolution tradeoff with this particular method. Each needle would be fed from a tube connected to its own control valve. Non bound material would act as support while the glue (or other binding agent) worked. In my imagination I see a chair made from shredded tires, and bonded with a silicon caulking like substance. The shredded tires would be filled into a container between the needles as the printing array rises.