Paraformaldehyde can also be used if sufficient water is added to the reaction to maintain {HEAD ~ all or a substantial portion} of {TAIL ~ the curative} in solution 
of
Paraformaldehyde can also be used if sufficient water is added to the reaction to maintain { HEAD ~ all or a substantial portion } of { TAIL ~ the curative } in solution
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH