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