Thixotropy

Thixotropy is a property of certain materials that become less viscous and flow more easily when stirred, shaken, or agitated, but then gradually return to a thicker, more solid state when left undisturbed. Think of materials like gel-based paints or ketchup: they are thick and resistant to flow at rest but become runny when stirred or shaken, making them easier to spread or pour. Once agitation stops, they slowly regain their original thicker consistency. This reversible change helps in applications where controlled flow and stability are important.