TRAEGERBAHN FUER PHOTOGRAPHISCHES PAPIER.

摘要

A support sheet (5) for photographic paper (1) having an enhanced resistance to curling, especially twist-curling, comprises a substrate paper sheet (2) composed of a half stratum portion (2a) thereof at the face side of a surface on which a photographic emulsion layer (4) will be formed and the other half stratum portion (2b) thereof at the back side of the opposite surface, and two polyolefin resin coating layers (3a, 3b) on the two surfaces of the substrate paper sheet (2), the substrate paper sheet (2) having a resiliency satisfying the relationships (I) and (II): 1.5 wherein Ef l = a modulus of elasticity of the face side half stratum portion (2a) in the longitudinal direction of the substrate (2), Ebt = a modulus of elasticity of the back side half stratum portion (2b) in the transverse direction of the substrate (2), Eft = a modulus of elasticity of the face side half stratum portion (2a) in the transverse direction of the substrate (2), and Eb l = a modulus of elasticity of the back side half stratum portion (2b) in the longitudinal direction of the substrate (2).