There are many methods of measurements for viscoelastic liquid and gelation. In this
section, the method by means of rheometer is introduced. An apparatus and schematic
representation of dynamic viscoelasticity during the sol – gel transition are shown in Figure
9 and 10, respectively. The rheometer with a parallel plate or cone and plate test
configuration is often used in oscillatory mode. The paste was placed on the plate of the
rheometer. Torque is monitored at constant oscillating frequency and angular displacement.