Table 2.

Rheological behavior of Betoptic and MIDFDS (n = 3).

Formulation	Power law equation	Non-Newtonian index (n)	Correlation coefficient (r)	Fluid type
Betoptic	$\tau =0.205{\dot{\gamma }}^{0.626}$	0.626 < 1	0.9986	Pseudoplastic fluid
MIDFDS	$\tau =10.36{\dot{\gamma }}^{0.265}$	0.265 < 1	0.9716	Pseudoplastic fluid