A method includes receiving a measurement associated with an anisotropy of a first surface and a measurement associated with {HEAD ~ an anisotropy} of {TAIL ~ a second surface} of a sheet of material 
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A method includes receiving a measurement associated with an anisotropy of a first surface and a measurement associated with { HEAD ~ an anisotropy } of { TAIL ~ a second surface } of a sheet of material
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH