Thixotropy is a form of time dependent behaviour describing a material whose viscosity decreases over time while it is subjected to shearing forces. After some time the material recovers completely to its original state.
Thixotropy should not be confused with rheopexy, a rare phenomenon, (rheopexy is also time dependent, but the viscosity increases with time). The following techniques and discussions for measuring thixotropy apply for rheopectic measurements also.
Rheodestruction is also a time related phenomenon, but rheodestroyed materials do not recover their initial state. The following techniques and discussions for measuring thixotropy apply for rheodestructive measurements also.
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