Patent ID: 7166338

Claim:
An optically semi-transmission reflection material comprising a resinous film, said resinous film comprising a thermoplastic resin, wherein the sum of total light ray transmittance, T %, and total light ray reflectance, R %, is 80 to 100%; |(T−R)|<50%; when displayed value a and displayed value b in transmitted light are designated as a T and b T , respectively, and when in reflected light, displayed value b is designated as b r , in the transmitted light, a T and b T are in the range of −2≦a T ≦2, and −2 b T 1.3 and the difference between the displayed value b of the transmitted light and the reflected light is |(b T −b r )|<10; wherein the resinous film comprises a multi-layered resinous oriented film obtained by laminating at least two layers of surface-protecting layer (A) and base layer (B), and optionally back-surface protecting layer (C), then biaxially orienting the resulting laminated product; wherein in the multi-layered resinous oriented film, a ratio of a longitudinal direction orientation magnification, L MD to a lateral direction orientation magnification, L CD , L MD /L CD is 0.2 to 3.