The pigment is added to {TAIL ~ the reaction mixture}, preferably in the form of an aqueous surfactant solution, before completion of {HEAD ~ the reaction} so as to become entrapped in a matrix formed by the magnesium stearate and magnesium oxide components of the reaction product composition 
The pigment is added to { TAIL ~ the reaction mixture } , preferably in the form of an aqueous surfactant solution , before completion of { HEAD ~ the reaction } so as to become entrapped in a matrix formed by the magnesium stearate and magnesium oxide components of the reaction product composition
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH