Heat-developable image-recording element
AssigneePolaroid Corporation
InventorKent M. Young
Life of this patent
Estimating the term…
Abstract
A heat developable photosensitive image-recording element is described comprising photosensitive silver halide, either as the only source of silver present or in association with a substantially light-insensitive source of silver, a reducing agent, a silver solvent and an image-receiving layer including silver nucleating material. The total amount of silver present is arranged in two adjacent discrete layers, one of which includes the silver reducing agent and the other of which does not. The image-recording element provides an image having significantly increased image density upon exposure and photographic processing.
Claims11
A heat-developable image-recording element comprising
- a first support and an optional second support and carried by said first support or confined between said first and second supports
- a silver solvent,
- a silver reducing agent,
- an image-receiving layer comprising silver nucleating material,
- a first layer including photosensitive silver halide adjacent to a second layer including photosensitive silver halide,
- wherein said first layer includes said silver reducing agent and said second layer does not include any silver reducing agent and said first layer is closer to said image-receiving layer than said second layer.
A heat-developable image-recording element comprising
- a first element comprising a support carrying a first layer including photosensitive silver halide adjacent to a second layer including photosensitive silver halide, and wherein said first layer includes a silver reducing agent and said second layer does not include any silver reducing agent;
- a second element comprising a support carrying an image-receiving layer and in superposed or superposable relationship with said first element, wherein said first layer of said first element is closer to said image-receiving layer of said second element than said second layer of said first element;
- a silver solvent located in at least one of said first and second elements;
- and
- means for providing alkali to said first and second elements.
Dependencies are inferred from the claim text.