Subjective evaluation of the usability of the test substance (Table 
In the ‘taste’ parameter, BT showed significantly higher values than the other three test samples, and there were no significant differences among the other test samples (p < 0.05). NP was lower than PK, BT, and DW in the ‘unstickiness’ parameter (p < 0.05). Meanwhile, DW showed lower values than BT (p < 0.05). PK was higher than DW in the ‘stability’ parameter (p < 0.05). Meanwhile, NP was higher than BT and DW (p < 0.05). No significant difference was observed between DW and BT (p < 0.05). In the ‘wettability’ parameter, PK was higher than NP but lower than BT (p < 0.05). BT was the highest among the test samples (p < 0.05). Finally, PK was higher than NP and DW in the ‘washability’ parameter (p < 0.05). Meanwhile, no significant difference was observed between PK and BT (p < 0.05). NP showed lower values than PK and BT (p < 0.05). DW was the lowest among the test samples (p < 0.05).
Subjective evaluation of the usability of the test samples (mm)