Claims
- 1. An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, 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.
- 2. An aqueous alkaline processing liquid according to claim 1, wherein the molar ratio of (I) to (II) is from 1/1 to 1/20.
- 3. An aqueous alkaline processing liquid according to claim 1, wherein said liquid contains an amount of inorganic alkaline substance(s) other than an alkali metal sulphite in an amount of at most 0.2 mol.
- 4. An aqueous alkaline processing liquid according to claim 1, wherein said liquid contains dissolved sulphite ions in a concentration in the range of 16 to 76 g/l.
- 5. An aqueous alkaline processing liquid according to claim 1, wherein said liquid contains dissolved thiosulphate ions in a concentration in the range of 0.03 to 0.13 mol/l.
- 6. A silver complex diffusion transfer reversal process which is carried out by development of an information-wise exposed silver halide emulsion layer with a developing agent in the presence of a silver halide solvent to form diffusible silver complexes which diffuse into an image-receiving layer containing development nuclei, and in which said information-wise exposed photographic silver halide emulsion layer is moistened with an aqueous alkaline processing liquid, 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.
- 7. A silver complex diffusion transfer reversal process according to claim 6, wherein the moistening of said silver halide emulsion layer with said processing liquid proceeds while or before said layer is in relationship with an image-receiving layer to allow therein the transfer of complexed silver ions.
- 8. A silver complex diffusion transfer reversal process according to claim 7, wherein said liquid and/or said image-receiving layer and/or a hydrophilic colloid layer in waterpermeable relationship therewith and/or a back layer at the side of the support opposite to that carrying the image-receiving layer contains at least one silver image toning agent.
- 9. A silver complex diffusion transfer process according to claim 6, wherein said image-receiving material contains a water-impermeable support coated with (1) an image-receiving layer containing physical development nuclei dispersed in a waterpermeable binder and (2) a waterpermeable top layer free from development nuclei and containing a hydrophilic colloid, in such a way that:
- (i) the total solids coverage of said two layers (1) and (2) is at most 2 g/m2,
- (ii) in layer (1) the coverage of the nuclei is in the range of 0.1 mg/m2 to 10 mg/m2, and the coverage of binder is in the range of 0.4 to 1.5 g/m2, and
- (iii) in said top layer (2) the coverage of hydrophilic colloid is in the range of 0.1 to 0.9 g/m2.
Priority Claims (1)
Number |
Date |
Country |
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8920252 |
May 1989 |
EPX |
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Parent Case Info
This is a continuation of co-pending application Ser. No. 07/524,381 filed on May 17, 1990, now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
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Parent |
524381 |
May 1990 |
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