The method 1, wherein the splitting up includes splitting up the remaining fraction high in {HEAD ~ plastics} into the light fraction and {TAIL ~ the heavy fraction} by air sifting 
into
The method 1 , wherein the splitting up includes splitting up the remaining fraction high in { HEAD ~ plastics } into the light fraction and { TAIL ~ the heavy fraction } by air sifting
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH