The solution is then cooled, and the dye collected by {TAIL ~ filtration} and dried in {HEAD ~ air} 
The solution is then cooled , and the dye collected by { TAIL ~ filtration } and dried in { HEAD ~ air }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD