. "Sample N was a film prepared to have balanced orientation, i.e., 6.5 MDX and 6.5 TDX. Sample O was a film prepared from a sheet identical to that used for Sample N, but prepared to have an orientation imbalance, i.e., 6.0 MDX and 9.5 TDX. (The process conditions for casting and orienting the two films were substantially identical.) The balanced film (Sample N) exhibited a MD gauge band running dow" . . .