The aluminum coating is next to the support and protected from {HEAD ~ the ambient atmosphere} by {TAIL ~ the clear Mylar film} 
The aluminum coating is next to the support and protected from { HEAD ~ the ambient atmosphere } by { TAIL ~ the clear Mylar film }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL