Substantially all of the functional coating is removed from a peripheral region of the first major surface while {HEAD ~ substantially all} of {TAIL ~ the functional coating} is simultaneously removed from a peripheral region of the second major surface 
of
Substantially all of the functional coating is removed from a peripheral region of the first major surface while { HEAD ~ substantially all } of { TAIL ~ the functional coating } is simultaneously removed from a peripheral region of the second major surface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH