The mixture can be subjected to, e.g., a compression or injection molding process, to obtain solid spheres for the center or hemispherical {HEAD ~ shells} for forming {TAIL ~ an intermediate layer} 
The mixture can be subjected to , e.g. , a compression or injection molding process , to obtain solid spheres for the center or hemispherical { HEAD ~ shells } for forming { TAIL ~ an intermediate layer }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL