For example, the optical surface of {HEAD ~ a mold} half can be corona treated to modify {TAIL ~ the surface properties} 
For example , the optical surface of { HEAD ~ a mold } half can be corona treated to modify { TAIL ~ the surface properties }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL