Distilled water

270 ml

HPMC conc.

0.05 ~ 0.2 wt%

α-oil

27 ml

Calcium chloride

1 g

Stearic acid conc.

0.1 ~ 1.0 wt% oil

Lecithin conc.

3 ml (0.1wt% oil)

Tannic acid soln.

3 ml (0.2 mol)

Revolution speed to form (W/O) emulsion

3000 rpm

Revolution time

10 min

Reaction temperature

40˚C

Reaction time

1 h

Revolution speed to form [(S + W)/O/W]

Emulsion and to prepare microcapsules

300 rpm