Viscosity of all the formulated microemulsions was measured using a Brook Field Viscometer (model LVF 69726) supplied with UL-adapter. All the experiments were performed at 25 °C and in triplicates.
Turbidity of the formulated microemulsions was analyzed by measuring the absorbance at 600 nm. Absorbance of undiluted samples at 600 nm was recorded using UV–visible spectrophotometer (2201, Systronics, India).