Starch was mixed well with water to 48% moisture
and extruded in a co-rotating twin-screw extruder
with a 1.0 mm die opening and a screw speed of 40 rpm at 70 C. Noodles were
collected after torque and die pressure reached a steady
state, and stored at 4 C for 24 h prior to drying at 40 C
overnight.