Processing liquid for the silver salt diffusion transfer process containing 3-(N,N-diethylamino)propane-1,2-diol
AssigneeAgfa-Gevaert
InventorJean-Pierre D. Tahon
Life of this patent
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Abstract
An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein said liquid contains 3-(N,N-diethylamino)propane-1,2-diol and contains phosphate ions in a concentration of not more than 0.03 mol/l.
Claims10
An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal process wherein complex silver ions are transferred to an image receiving element which comprises a silver halide solvent and is substantially free from developing agents characterized in that said liquid comprises 3-(N,N-diethylamino)propane-1,2-diol in an amount between 0.1 mol/l and 1.5 mol/l and wherein said liquid is free of phosphate ions.
A method for obtaining an image comprising information-wise exposing a photographic material containing a silver halide emulsion layer and (a) developing agent(s) and developing said information-wise exposed photographic material according to the silver complex diffusion transfer reversal process while in contact with an image receiving layer containing physical development nuclei wherein complex silver ions are transferred to an image receiving element using an aqueous alkaline processing liquid substantially free of developing agents and phosphate ions and comprising a silver halide solvent and 3-(N,N-diethylamino)propane-1,2-diol in a total amount between 0.1 mol/l to 1.5 mol/l.
A method for obtaining an image comprising information-wise exposing a photographic material containing a silver halide emulsion layer and developing said information-wise exposed photographic material according to the silver complex diffusion transfer reversal process while in contact with an image receiving layer containing physical development nuclei wherein complex silver ions are transferred to an image receiving element using an aqueous alkaline processing liquid comprising a silver halide solvent, 3-(N,N-diethylamino)propane-1,2-diol, at least one developing agent of the p-hydroxybenzene type and phosphate ions from 0.0 mol/l to 0.03 mol/l.
Dependencies are inferred from the claim text.