Negative silver salt diffusion transfer material
US5262271A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1991 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Oct 10, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
According to the present invention a method for producing a negative image is provided, comprising the following steps: PA0 image-wise exposing an imaging element comprising on a support, a light-sensitive silver halide emulsion layer comprising silver halide grains having an average volume of not more than 0.02 .mu.m.sup.3 and a layer containing non-light-sensitive water insoluble silver salt, to produce a latent image in said layer of light-sensitive silver halide PA0 developing said latent image to produce physical development nuclei of silver PA0 dissolving the non-light-sensitive silver salts using a silver salt complexing agent and PA0 allowing the thus formed silver salt complexes to diffuse to the layer containing said image-wise formed physical development nuclei of silver to image-wise deposit and develop said silver salt complexes on said image-wise formed physical development nuclei of silver in the presence of (a) developing agent(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.