Agfa Gevaert Nv

Raymond L Odeurs

Rene M De Keyzer

Luc A De Brabandere

An aqueous alkaline processing liquid for use in silver halide photography, wherein said liquid comprises one or more alkanolamines, the said alkanolamines consisting of one or more tertiary alkanolamines in a total amount in the range from 0.3 mol/l to 1.5 mol/l, and one or more secondary alkanolamines in an amount from 0 mol % to 30 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains sulphite ions in an amount in the range of 16 g/l to 30 g/l.

Processing liquid for use in silver complex diffusion transfer processing

An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein wherein said liquid contains a mixture of alkanolamines, the said mixture consisting of (I) N-methyl-diethanolamine and of (II) N,N-dimethyl-ethanolamine in a total amount in the range from 0.3 mol/l to 1.5 mol/l, and in a molar ratio of (I) to (II) from 1/20 to 20/1.

Liquid for DTR-photography

An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.3 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount from 0 mol % to 5 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1. 885

Processing liquid with combination of toners for silver complex

An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.15 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount higher than 5 mol % but not higher than 100 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.

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Edegem, Belgium

Raymond L Odeurs