EP 0738400 B1 20010228 - NON-HYDROQUINONE PHOTOGRAPHIC DEVELOPER COMPOSITION AND PROCESSING METHOD
Title (en)
NON-HYDROQUINONE PHOTOGRAPHIC DEVELOPER COMPOSITION AND PROCESSING METHOD
Title (de)
PHOTOGRAPHISCHE ENTWICKLERZUSAMMENSETZUNG OHNE HYDROCHINON UND VERARBEITUNGSVERFAHREN
Title (fr)
COMPOSITION DE REVELATEUR PHOTOGRAPHIQUE SANS HYDROQUINONE ET PROCEDE DE TRAITEMENT
Publication
Application
Priority
- US 9406353 W 19940610
- US 7802493 A 19930618
Abstract (en)
[origin: WO9500881A1] A non-hydroquinone photographic developer composition consisting essentially of: (a) a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, or alkali metal salts and mixtures thereof, in an amount of 0.1 to 0.4 mol/liter (mol/l); (b) an effective amount of an auxiliary developing agent comprising a 3-pyrazolidone compound, an aminophenol or a mixture thereof; (c) an alkali metal sulfite in an amount less than or equal to 0.32 mol/l; (d) an alkali metal carbonate in an amount of 0.1 to 0.4 mol/l; (e) an alkali metal hydroxide in an amount of from 10 to 25 g/l where an ascorbic acid or sugar-type derivative thereof is present in the form of a free acid or from 3 to 15 g/l where an ascorbic acid or sugar-type derivative thereof is present in the form of an alkali metal salt; and (f) with the developer composition having a pH of from 10.3 to 12.5 at 25 DEG C; where the developer composition is useful for processing standard rapid access films while showing an especially advantageous effect in the processing of silver halide emulsions containing a hydrazine compound to achieve lith quality, and high dot quality in a stable development solution. In a preferred embodiment, the developer composition does not contain an alkanolamine.
IPC 1-7
IPC 8 full level
G03C 5/29 (2006.01); G03C 1/06 (2006.01); G03C 5/30 (2006.01); G03C 5/31 (2006.01)
CPC (source: EP US)
G03C 5/30 (2013.01 - EP US); G03C 1/061 (2013.01 - EP US); G03C 7/384 (2013.01 - EP US); G03C 2200/48 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9500881 A1 19950105; AT E199461 T1 20010315; AU 1092295 A 19950117; AU 689168 B2 19980326; AU 689168 C 20011122; CN 1053970 C 20000628; CN 1129989 A 19960828; DE 69426780 D1 20010405; DE 69426780 T2 20011004; EP 0738400 A1 19961023; EP 0738400 A4 19960618; EP 0738400 B1 20010228; JP H09500221 A 19970107; MY 111751 A 20001230; SG 34338 A1 20001219; US H2048 H 20020903
DOCDB simple family (application)
US 9406353 W 19940610; AT 94919380 T 19940610; AU 1092295 A 19940610; CN 94193074 A 19940610; DE 69426780 T 19940610; EP 94919380 A 19940610; JP 50286195 A 19940610; MY PI19941548 A 19940616; SG 1995002196 A 19940610; US 38860095 A 19950214