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