Optimised Conditions for Extrusion
The samples extruded at 14% MC, die temperature of 180 °C and screw speed of 150 rpm had the minimum retention of
36.63%. The sample extruded under 18% MC/140 °C/190 rpm had maximum colour retention of 64.52%, but showed an undesirable hard texture (7,811 g). Hence, sample at 16% MC/160 °C/170 rpm was selected since it had an optimum hardness (5,699 g) and good retention of colour (56.21%). This sample was then used for all further studies.