More preferably the catalyst comprises 0.125% to 0.25% by {HEAD ~ volume} of {TAIL ~ the catalyst solution} 
More preferably the catalyst comprises 0.125 % to 0.25 % by { HEAD ~ volume } of { TAIL ~ the catalyst solution }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL