Process for the production of photographic vesicular images in photographic silver halide material
AssigneeAgfa-Gevaert
InventorsEdith Weyde, Anita VON Konig, Werner Liebe
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Abstract
The production of an image in a dry process by forming a vesicle image upon the decomposition of a peroxide compound at image nuclei of silver by providing a layer containing a silver salt which forms upon exposure to light, in imagewise distribution, image nuclei. The silver salt has a grain size of less than 0.3 .mu.m and is present in the layer in an amount of from 1 - 500 mg/m.sup.2.
Claims22
A dry process for the production of photographic images in a self-supporting or supported layer including the steps consisting essentially of imagewise exposing a layer which is 80% transparent and contains a light-sensitive silver salt cast from an emulsion having a pAg value below the equivalence point and having from 1 to 500 mg silver salt per square meter of the layer with silver salt grains of a grain size smaller than 0.3 .mu.m, forming by said exposure image nuclei of silver imagewise in catalytic amounts capable of decomposing peroxide compounds on image nuclei;
- treating the said layer containing the catalytic amounts of nuclei of silver with hydrogen peroxide which is decomposed by the image nuclei to form light scattering vesicles;
- causing formation on said catalytic amounts of silver nuclei of an image of fine bubbles.
A dry process for the production of photographic images in a self-supporting or supported layer including the steps consisting essentially of imagewise exposing a layer which is 80% transparent and contains a light-sensitive silver salt cast from an emulsion having a pAg value below the equivalence point and having from 1 to 500 mg silver salt per square meter of the layer with silver salt grains of a grain size smaller than 0.3 .mu.m forming by said exposure image nuclei of silver imagewise in catalytic amounts capable of decomposing peroxide compounds on image nuclei;
- treating the said layer containing the catalytic amounts of nuclei of silver with hydrogen peroxide which is decomposed by the image nuclei to form light scattering vesicles;
- causing formation on said catalytic amounts of silver nuclei of an image of fine bubbles, including the step of heating the material to between 80.degree. and 130.degree. C before, during or after exposure.
Dependencies are inferred from the claim text.