The textures were tested using two Newtonian lubricants
manufactured by Cannon Instrument Company (product names
S60 and S600, highly refined mineral oils) with a nominal viscosity
η0¼0.14 and η0¼1.4 Pa s at T¼20 °C respectively. The viscosity of
the fluids measured as a function of temperature is shown
in Fig. 5, and the highlighted value (arrow) is the viscosity for the
temperature used in the experiments.