EP 0397167 A3 19910123 - METHOD OF FORMING IMAGES
Title (en)
METHOD OF FORMING IMAGES
Publication
Application
Priority
- JP 11683289 A 19890510
- JP 11683389 A 19890510
Abstract (en)
[origin: EP0397167A2] A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photosensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability: <CHEM> wherein R1 represents an aliphatic group or an aromatic group; R2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, <CHEM> or an iminomethylene group; and each of A1 and A2 represents a hydrogen atom, or one of A1 and A2 is a hydrogen atom and the other is an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.
IPC 1-7
IPC 8 full level
G03C 1/06 (2006.01); G03C 5/305 (2006.01)
CPC (source: EP)
G03C 1/061 (2013.01); G03C 5/305 (2013.01); G03C 2001/108 (2013.01)
Citation (search report)
- [Y] EP 0032456 B1 19830202
- [Y] FR 2402229 A1 19790330 - FUJI PHOTO FILM CO LTD [JP]
- [Y] US 4619886 A 19861028 - OKUTSU EIICHI [JP]
- [YP] EP 0324426 A2 19890719 - FUJI PHOTO FILM CO LTD [JP]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 13, no. 108 (P-843)(3456) 15 March 1989, & JP-A-63 286840 (FUJI PHOTO FILM) 24 November 1988,
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0397167 A2 19901114; EP 0397167 A3 19910123; EP 0397167 B1 19960313; DE 69025793 D1 19960418; DE 69025793 T2 19961017
DOCDB simple family (application)
EP 90108809 A 19900510; DE 69025793 T 19900510