Results and discussion
The third interval of the 3ITT test was used to analyze the thixotropic behavior of the sample. In Interval 3, after 120 sec, the structure and the viscosity of sample A reached 82 % of the initial value. It can therefore be concluded that the sample almost completely regenerated its structure after shearing. However, after 120 sec, the viscosity value of sample B reached only 62 % of the initial value. Sample A, with its rapid structural regeneration, showed less sagging but inadequate leveling, as its structure regenerated relatively quickly after structural processing. Sample B, however, with its slow structural regeneration, exhibited better leveling behavior. Due to the strong sag tendency, it was expected that sample B would produce an inadequate layer thickness. The structural regeneration must not be too fast, in order to allow for good leveling of the paint or coating, and it must not be too slow, in order to prevent sagging and to ensure a sufficient wet-layer thickness.