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