Metallation may be accomplished either at {HEAD ~ that temperature} or at a lower temperature following cooling of {TAIL ~ the slurry} 
Metallation may be accomplished either at { HEAD ~ that temperature } or at a lower temperature following cooling of { TAIL ~ the slurry }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL