{TAIL ~ Addition} of up to 60 wt% organic acid to the calcium hydroxide solution or {HEAD ~ suspension} is preferred 
{ TAIL ~ Addition } of up to 60 wt% organic acid to the calcium hydroxide solution or { HEAD ~ suspension } is preferred
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH