 mixing the colorant solution with water and {TAIL ~ an emulsifying agent} so as to obtain {HEAD ~ a colorant emulsion}; and 
mixing the colorant solution with water and { TAIL ~ an emulsifying agent } so as to obtain { HEAD ~ a colorant emulsion } ; and
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH