Dilatancy

A property of a fluid—such as printing ink—that describes a "false body," or a consistency, thickness, and viscosity that increases with the application of stress or other force. Some inks are somewhat fluid while in their containers, but upon the application of stress or shear forces become thicker and more viscous. Dilatancy is also called shear thickening. Some inks also exhibit the opposite property, thixotropy, in which the viscosity de'creases when stresses are applied.

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