The Thixotropic index refers to which of the following characteristics of resin?

The Thixotropic index is a measure of how a material’s viscosity changes when it is subjected to stress or agitation. In the context of resin, a thixotropic material has a high viscosity at rest but becomes less viscous when agitated or stirred. This property is particularly important in applications where the resin needs to be easy to apply and manipulate, yet maintain a solid form when not in motion, preventing sagging or dripping once placed.

When selecting resins for specific applications, knowing the Thixotropic index aids in evaluating how a resin will behave during the application process and after curing. Resins with the right degree of thixotropy can allow for better control and management during layup, ensuring a consistent and stable application that will ultimately cure into a desired shape and structural integrity.