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AssigneeEastman Kodak Company
InventorsMichael R. Roberts, Paul B. Gilman, Donald L. Black, Kurt M. Schroeder
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The present invention is directed to a method of forming a positive image in a photothermographic element comprising a potentially negative-working emulsion wherein fog density development is imagewise inhibited in exposed areas of the image upon thermal development, the element further comprising a developer or precursor thereof and an oxidized developer scavenging agent to accelerate development by removing oxidized developer as it is formed during the thermal development step. In one embodiment of the invention, in which a density-inhibiting agent is released during thermal development that inhibits the thermal development of unexposed silver salts in the exposed areas relative to the unexposed areas, the method comprises imagewise exposing the film with a non-solarizing amount of radiation/energy to form a latent image and thermally developing the latent image in a single development step to produce a positive image in the element. The present invention is also directed to a photothermographic element that can be used in the present process in which a positive image characterized by high speed and discrimination is formed when exposed and thermally heated above 150° C.
A method of forming a positive image in a photothermographic element that has been imagewise exposed to form a latent image, which element has at least one imaging layer comprising a potentially negative-working emulsion, said method comprising thermally developing the imagewise exposed element to produce a positive image in said imaging layer, wherein at the temperature of thermal development substantial imagewise inhibition occurs with respect to the exposed areas of the positive image relative to the unexposed areas of the positive image, wherein thermal development of unexposed silver grains in the exposed areas is inhibited relative to the unexposed areas and wherein negative image development is inhibited, and wherein the method further comprises a developer or precursor thereof and an oxidized developer scavenging agent to accelerate development by removing oxidized developer or precursor thereof as it is formed during the thermal development step, wherein said oxidized developer scavenging agent is an aromatic alcohol capable of reacting with said oxidized developer or precursor thereof;
A method of forming a positive image in a photothermographic element that has been imagewise exposed to form a latent image, which element has at least one imaging layer comprising a potentially negative-working emulsion, said method comprising thermally developing the imagewise exposed element to produce a positive image in said imaging layer, wherein at the temperature of thermal development substantial imagewise inhibition occurs with respect to the exposed areas of the positive image relative to the unexposed areas of the positive image, wherein the thermal development of unexposed silver salts in the exposed areas is inhibited relative to the unexposed areas, wherein negative image development is inhibited, wherein the method further comprises a developer or precursor thereof and an oxidized developer scavenging agent to accelerate development by removing oxidized developer or precursor thereof as it is formed during the thermal development step, wherein said oxidized developer scavenging agent is an aromatic alcohol capable of reacting with oxidized developer or precursor thereof to form a dye during the thermal development step, and wherein the method further comprises the presence in the element of a light-sensitive silver halide and at least two organic non-halide silver salts, a first and a second organic silver compound, wherein a density-inhibiting agent is released by at least one of the organic silver salts.
Dependencies are inferred from the claim text.