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Lithographic type diffusion transfer developing composition
| Details |
Inventors: Kubotera, Kikuo; Mizuki, Eiichi; Satomura, Masato; Iwano, Haruhiko; Fujiwara, Tadahiro;
Assignee: Fuji Photo Film Co., Ltd. (Minami-ashigara, JP)
Primary Examiner: Schilling; Richard L.
Assistant Examiner: Goodrow; John L.
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak and Seas
A lithographic type diffusion transfer developing composition which provides high contrast images having sharp toe-gradation for developing silver halide light-sensitive materials contains at least one amine represented by one of the following general formulae (I), (II) or (III): H.sub.2 N-C.sub.n H.sub.2n -X (I) ##STR1## X, X', R.sub.1, n and m are defined in the specification. The process of developing using such a composition is also disclosed. |
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DETAILED DESCRIPTION It is, therefore, one object of the present invention to prepare a half-tone dot photographic original plate by the process of diffusion transfer development.
Another object of the invention is to provide a process for improving the half-tone dot photographic properties, particularly to markedly reducing the formation of fringe in a diffusion transfer development.
A further object of the invention is to provide a diffusion transfer developer having good preservability, since a diffusion transfer developer, particularly a sulfite ion-free diffusion transfer development, shows weak resistance against air oxidation.
Still a further object of the invention is to provide a process for optionally changing the maximum density without a reduction in the contrast of a transferred positive silver image by varying the amount of the amine or the derivative thereof added to the developer.
Yet a further object of the invention is to provide a process for accelerating the course of development and changing the tone of a transferred silver image.
A further object of the invention is to provide a developer relatively insensitive to variations in development temperature.
Still a further object of the invention is to provide a process for preparing a silver image having metallic gloss at the surface thereof.
Still yet a further object of the invention is to provide a process for preventing hardening of a negative emulsion layer of a multi-layer type diffusion transfer light-sensitive material by a quinone and to impart a good delaminating property between the negative emulsion layer and a positive image-receiving layer.
The above-described objects of the invention are attained by using a lithographic type diffusion transfer developing composition prepared by adding an amine compound to a conventionally known diffusion transfer developing composition, that is, the present invention relates to a photographic developing composition to be used in a process of diffusion transfer development using a silver halide light-sensitive material, wherein an amine or a derivative thereof is incorporated in the developing composition
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Molecular Biology 
