| abstract |
(57) [Summary] [Object] To provide a biaxially oriented polyethylene-2,6-naphthalate film for photographic light-sensitive materials, which is excellent in delamination resistance, has small thickness unevenness, and has less wrinkles (flatness) on the surface. [Structure] A biaxially oriented polyethylene-2,6-naphthalate film having a refractive index (nz) in the thickness direction of 1. A film for a photographic light-sensitive material, having a thickness of 498 or more, a thickness unevenness of 5 μm or less in both the vertical and horizontal directions, and a flatness of 250 cm / m or less. |