The effect of the air pressure 14 is to engage the layers 3 with the moulding surface 11 and to densify the layers 3, {HEAD ~ the densification} causing {TAIL ~ a 20 to 30% reduction} in the thickness e of the article 1 
The effect of the air pressure 14 is to engage the layers 3 with the moulding surface 11 and to densify the layers 3 , { HEAD ~ the densification } causing { TAIL ~ a 20 to 30 % reduction } in the thickness e of the article 1
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH