a first screening layer, adjacent to said panel core, having {HEAD ~ a predetermined non thickness dimension} that is less than {TAIL ~ said pre determined non thickness dimension} of said panel core and 
is less than
a first screening layer , adjacent to said panel core , having { HEAD ~ a predetermined non thickness dimension } that is less than { TAIL ~ said pre determined non thickness dimension } of said panel core and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH