{HEAD ~ The additive} is either an ionic additive or an amine additive which forms an ionic ammonium type salt in {TAIL ~ the acidic precursor solution} 
{ HEAD ~ The additive } is either an ionic additive or an amine additive which forms an ionic ammonium type salt in { TAIL ~ the acidic precursor solution }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL