| 摘要 |
An emulsion comprising a substantially light-insensitive organic silver salt, photosensitive silver halide in catalytic association with the substantially light-insensitive organic silver salt and a binder, wherein the emulsion further comprises a polyhalide compound selected from the group consisting of quaternary ammonium polyhalides, quaternary phosphonium polyhalides and ternary sulphonium polyhalides, which satisfies a test specified in the description, or a product of a reaction between the polyhalide compound and a reducing species present in said emulsion; a process for producing a photothermographic recording material, capable of image formation without preliminary heating prior to exposure, comprising a photo-addressable thermally developable element incorporating the emulsion; and a photothermographic recording process utilizing the photothermographic recording material.
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