Base film for photographic film

• Main Authors: KITAZAWA, SATOSHI, KIMURA, MANABU, ICHIHASHI, TETSUO, KURIHARA, HIDESHI
• Format: Patent
• Language: English; French; German
• Published: 16.12.1998
• Edition: 6
• Subjects: AUXILIARY PROCESSES IN PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HOLOGRAPHY; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

A base film for a photographic film, wherein (A) the base film is formed of a polyethylene-2,6-naphthalenedicarboxylate copolymer formed from 2,6-naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main glycol component; (B) a solution of 10 mg/ml of said copolymer in a hexafluoroisopropanol/chloroform mixed solvent having a hexafluoroisopropanol/chloroform weight ratio of 2/3 shows a light transmittance, T400, of at least 97 %/cm at a wavelength of 400 nm; (C) the film has a yellow index, YID, of 5 or less; and (D) the film has a haze value of 2.0 % or less.