Abstract: Disclosed is a photopolymerizable composition containing an addition-polymerizable ethylenically unsaturated compound, a photopolymerization initiator, a polymer binder, and a sensitizing dye represented by the following formula (A), wherein R1, R2, R3, R4, R5 and X are as defined in the specification.

Abstract: Both single-layer and multilayer imageable elements have a substrate and at least one imageable layer. The elements can be used to prepare either negative- or positive-working imaged elements, for example as lithographic printing plates. The imageable elements also include a radiation absorbing compound and a solvent-resistant polymer comprising pendant phosphoric acid groups, pendant adamantyl groups, or both. When this polymer comprises pendant adamantyl groups, they are connected to the polymer backbone through a urea or urethane group. The imageable elements have improved chemical resistance and thermal bakeability from the presence of the unique solvent-resistant polymer.

Abstract: A positive-working imageable element comprises inner and outer layers and a radiation absorbing compound such as an IR absorbing dye. The inner layer includes a first polymeric material. The ink receptive outer layer includes a second polymeric binder comprising a polymer backbone and an —X—C(?T)—NR—S(?O)2— moiety that is attached to the polymer backbone, wherein —X— is an oxy or —NR?— group, T is O or S, R and R? are independently hydrogen, halo, or an alkyl group having 1 to 6 carbon atoms. After thermal imaging, the element can be developed using an alkaline developer. Use of the particular second polymeric binder reduces sludging in the developer. Its dissolution rate in the developer is slow enough to resist developer attack in the non-imaged areas of the outer layer but rapid enough for the second polymeric binder to be quickly loosened from imaged areas and kept suspended or dissolved for a considerable time.

Abstract: The invention provides a polymerizable composition comprising: a binder polymer containing at least an acid group having an acid dissociation constant (pKa) of 5.5 or more and a radical addition polymerizable group, and a radical-generating compound capable of generating a radical with light or heat. Further, the invention provides a negative-working planographic printing plate precursor which has a recording layer containing the polymerizable composition. Use of the polymerizable composition of the invention provides a planographic printing plate precursor that is capable of forming high-quality images free from stains in non-image portions, and further has high strength in formed image portions and excellent printing endurance.

Abstract: A photothermographic material including, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first organic silver salt, a reducing agent, and a binder, and at least one non-photosensitive layer which is disposed on the same side as the image forming layer and farther from the support than the image forming layer, wherein 50% or more of a total projected area of the photosensitive silver halide is occupied by tabular grains having a silver iodide content of 40 mol % or higher and an aspect ratio of 2 or more, and the non-photosensitive layer comprises a second organic silver salt, and an image forming method using the same. The invention provides a photothermographic material and an image forming method excellent in image tone and image storability.

Abstract: The invention generally relates to positive-working coating compositions and to a substrate formed with a coating of that composition. Advantageous versions of the invention provide an infrared imageable, positive lithographic printing plate having a coating comprising a hydroxy substituted polymer, a diphenylcarbinol solubility suppressing compound and an infrared radiation absorbing compound.

Abstract: A negative-working, imageable element comprises a substrate and an IR-sensitive imageable layer comprising a dispersion of nanofibers of a preformed IR-sensitive polymer. The nanofibers can be composed of polyaniline, polypyrrole, or polythiophene. The IR-sensitive imageable layer containing the nanofibers can be imaged using infrared radiation and used for printing without further processing. Thus, both imaging and printing can be carried out on-press.

Abstract: A masking film has a unique polymeric binder in the imageable layer that enables the imaged film to be readily solubilized in non-chlorinated developers when it is used to form a relief image in a radiation-sensitive element, such as a UV-sensitive flexographic printing plate precursor. The polymeric binders in the imageable layer are resins that can be dissolved or dispersed in cyclohexane at 10% solids at 23° C. within 24 hours.

Abstract: Substrate films, thermal mass transfer donor elements, and methods of making and using the same are provided. In some embodiments, such substrate films and donor elements include at least two dyads, wherein each dyad includes an absorbing first layer and an essentially non-absorbing second layer. Also provided are methods of making a donor element that includes an essentially non-absorbing substrate, an absorbing first layer, and a non-absorbing second layer, wherein the composition of the essentially non-absorbing substrate is essentially the same as the composition of the essentially non-absorbing second layer.

Abstract: Single-layer and multilayer imageable elements have a substrate and at least one imageable layer and can be used to prepare positive-working lithographic printing plates. The imageable elements also include a radiation absorbing compound and a solvent-resistant polymer binder comprising an —N(R)—C(?X)—N(R?)—S(?O)2— moiety that is attached to the polymer backbone, wherein X is O or S, R and R? are independently hydrogen, halo, or an alkyl group having 1 to 6 carbon atoms. This solvent-resistant polymer binder is located in the imageable layer closest to the substrate and provides improved chemical resistance.

Abstract: A color image-forming material capable of drawing an image by infrared laser exposure and excellent in image visibility, storage stability and white light stability, and an on-press development or non-processing (non-development) type lithographic printing plate precursor ensuring high sensitivity and high press life and being excellent in image visibility, on-press developability and the like, are provided, which are a color image-forming material comprising an image recording layer capable of drawing an image by infrared laser exposure, the color image-forming material forming a color image without passing through a development processing step after image recording, wherein the image recording layer comprises (A) an infrared absorbent, (B) a cyclic color-forming compound having a cyclic structure within the molecule and forming a dye by a ring opening, and (C) a dye stabilizer which is a compound interacting with the cyclic color-forming compound to stabilize the ring-opened dye body and cause color formati

Abstract: A primer layer that includes a surface-tension modifier dispersed within a polymer binder is disposed between the imaging layer and the substrate of a lithographic printing member to inhibit the production of thermal degradation products that disrupt the oleophilicity of the exposed imaged areas, thereby improving print-making performance and efficiency. In addition, embodiments of the primer layer inhibit static charge buildup during production and during the print-making process.

Abstract: Multilayer, positive working, thermally imageable, bakeable imageable elements have a substrate, an underlayer, and a top layer. The underlayer comprises a polymeric material that comprises, in polymerized form from about 5 mol % to about 30 mol % of recurring units derived from an ethylenically unsaturated polymerizable monomer having a carboxy group; from about 20 mol % to about 75 mol % of recurring units derived from N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; and from about 3 mol % to about 50 mol % of recurring units derived from a compound represented by the formula: CH2?C(R2)—C(O)—NH—CH2—OR1, in which R1 is C1 to C12 alkyl, phenyl, C1 to C12 substituted phenyl, C1 to C12 aralkyl, or Si(CH3)3; and R2 is hydrogen or methyl. Other materials, such as a resin or resins having activated methylol and/or activated alkylated methylol groups, such as a resole resin, may be present in the underlayer.

Abstract: 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. In one embodiment of the invention, a density-inhibiting agent is released during thermal development which agent inhibits the thermal development of unexposed silver salts in the exposed areas relative to the unexposed areas. The method preferably 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.

Abstract: A method of preparing negative-working, single-layer imageable elements improves their storage stability in a humid environment. The method includes enclosing the coated imageable elements in a water-impermeable sheet material that substantially inhibits the transfer of moisture to and from the imageable element. Such imageable elements include a radiation-sensitive composition that includes a radically polymerizable component, an initiator composition to provide radicals upon exposure to imaging radiation, a radiation absorbing compound, and a polymeric binder having poly(alkylene glycol) side chains.

Abstract: Positive-working imageable elements are prepared by providing a first layer and second layers onto a substrate. Both layers include the same or different radiation absorbing compounds dispersed within different polymeric binders. After both layers are dried, they are heat treated at from about 40 to about 90° C. for at least 4 hours under conditions that inhibit the removal of moisture from the dried first and second layers. This method of preparation provides elements with improved imaging speed and good shelf life.

Abstract: A black and white thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing at least one substantially light-insensitive organic silver salt, a binder and optionally photosensitive silver halide, characterized in that the thermosensitive element further contains deliberately added metal nano-particles in a molar ratio with respect to the total molar concentration of the at least one substantially light-insensitive organic silver salt in the range of 0.05:1 to 10?6:1; and the use for the purpose of increasing the ratio of Dmax to the quantity of said substantially light-insensitive organic silver salts per unit area of the above-mentioned thermographic recording material.

Abstract: A positive-working imageable element comprises inner and outer layers and an infrared radiation absorbing compound such as an IR absorbing dye. The inner layer includes a first polymeric material. The ink receptive outer layer includes a second polymeric binder comprising pendant carboxy groups that provides improved chemical resistance to the imageable element and reduced residue from development.

Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material.

Abstract: A positive-working imageable element comprises inner and outer layers and a radiation absorbing compound such as an IR absorbing dye. The inner layer includes a first polymeric material. The ink receptive outer layer includes a second polymeric binder comprising a polymer backbone and an —X—C(?T)—NR—S(?O)2— moiety that is attached to the polymer backbone, wherein —X— is an oxy or —NR?— group, T is O or S, R and R? are independently hydrogen, halo, or an alkyl group having 1 to 6 carbon atoms. After thermal imaging, the element can be developed using an alkaline developer. Use of the particular second polymeric binder reduces sludging in the developer. Its dissolution rate in the developer is slow enough to resist developer attack in the non-imaged areas of the outer layer but rapid enough for the second polymeric binder to be quickly loosened from imaged areas and kept suspended or dissolved for a considerable time.

Abstract: A positive-working imageable element comprises inner and outer layers and a radiation absorbing compound such as an IR absorbing dye. The inner layer includes a polymeric material that is removable using an alkaline developer. An ink receptive outer layer is not removable using an alkaline developer before its exposure to imaging radiation. The outer layer includes a polymer binder having pendant epoxy groups that are substantially unreacted during exposure.

Abstract: The present invention relates to an image forming material having, on a substrate, an image forming layer that includes at least (A) a novolac type phenolic resin containing phenol as a structural unit, (B) a photo-thermal converting agent, and (C) a specific ammonium compound or a specific onium salt.

Abstract: The present invention is to provide an image forming method for a planographic printing plate. In the method, a planographic printing plate precursor in which an image recording layer containing a thermally sensitive and thermally curable material is formed on an aluminium support is scanning exposed with a relatively weak laser beam, and a latent image is formed, which is composed of an image recording layer part whose surface layer is thermally cured corresponding to an image and an unexposed image recording layer part which is not thermally cured. The unexposed image recording layer part which is not thermally cured is then removed by simple water development. Then, by carrying out heating, the whole image recording layer part remaining on the surface of the aluminum support is uniformly cured and firmly fixed. The invention also provides an image forming apparatus for a planographic printing plate.

Abstract: A donor element is described for use in a thermal imaging process. The donor element includes a support; a heating layer, and a colorant containing thermally imageable layer comprising a crosslinkable binder having a number average molecular weight of about 1,500 to about 70,000. A process for making a color filter using a thermal imaging process, and a liquid crystal display using this color filter are also described.

Abstract: A black and white thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing at least one substantially light-insensitive organic silver salt, a binder and optionally photosensitive silver halide, characterized in that the thermosensitive element further contains deliberately added metal nano-particles in a molar ratio with respect to the total molar concentration of the at least one substantially light-insensitive organic silver salt in the range of 0.05:1 to 10?6:1; and the use for the purpose of increasing the ratio of Dmax to the quantity of said substantially light-insensitive organic silver salts per unit area of the above-mentioned thermographic recording material.

Abstract: Methods of forming a dye donor layer of a dye-donor element for a thermal dye transfer system are described. The methods include coating colored particles in a compressed carrier fluid on the substrate of the dye-donor element.

Abstract: A heat-sensitive composition which forms an image without the removal of material, which does not require any developing treatment after the stage of exposure to heat and comprises: (a) a switchable polymer, (b) an IR absorber, (c) a triazine compound, and (d) a novolak resin. Negative lithographic plate comprising a substrate coated with the said composition. A method for obtaining a negative image on a substrate coated with a composition which is first hydrophobic and then lipophilic after exposure to heat, without the removal of material, the said negative image being obtained by applying a small quantity of energy to the said composition.

Abstract: Positive-working imageable elements comprise a radiation absorbing compound and inner and outer layers on a substrate having a hydrophilic surface. The inner layer comprises a polymer that is removable using an alkaline developer and in which from about 1 to about 50 mol % of its recurring units are derived from one or more of the ethylenically unsaturated polymerizable monomers represented by the following Structure (I): CH2?C(R1)C(?O)NR2(CR3R4)nOH ??(I) wherein R1, R2, R3, and R4 are independently hydrogen, lower alkyl, or phenyl, and n is 1 to 20. The imageable elements having improved resistance to development and printing chemicals and solvents.

Abstract: Imaging layers, image recording media, and methods of preparation of each, are provided. One exemplary embodiment of the imaging layer, among others, includes a matrix, a radiation absorbing compound dissolved in the matrix, at least two activators substantially dissolved in the matrix, and a color former. The activators can include a primary activator having a higher acidity than a secondary activator. In addition, the primary activator has a lower solubility in the matrix than the secondary activator. The color former is substantially insoluble in the matrix at ambient conditions and is substantially uniformly distributed in the matrix.

Abstract: A photothermographic material having an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer on at least one side of a support, in which the binder is a hydrophilic binder, the non-photosensitive layer contains gelatin or a gelatin derivative, the reducing agent is a compound represented by the following formula (R), and at least one compound represented by the following formula (I) or (II) is contained: (wherein in formula (R), R11 and R11? each independently represent an alkyl group and at least one of R11 and R11? is a secondary or tertiary alkyl group); (wherein in the formula (I), Q represents an atomic group necessary for forming a 5 or 6-membered imide ring); and (wherein in the formula (II), R5 independently represents a hydrogen atom or a substituent, r represents 0, 1, 2, 3 or 4, and X represents O, S, Se or N(R6)).

Abstract: Disclosed are a printing plate material comprising a support and provided thereon, a hydrophilic layer and a thermosensitive image formation layer in that order, wherein the hydrophilic layer contains from 40 to 90% by weight of metal oxide particles having a light-to-heat conversion function and the thermosensitive image formation layer contains from 10 to 50% by weight of a water-soluble polymer.

Abstract: A polymer, which contains a structural unit having a carboxyl group represented by the following formula (1) at a side chain of the structural unit, wherein no deposition is formed, when the polymer is dissolved in an alkali aqueous solution having a pH of 10 or more and kept at 25° C. for 60 days: wherein R1 represents a hydrogen atom or a methyl group; R2 represents an (n+1)-valent organic linking group containing an ester group represented by —O(C?O)—; A represents an oxygen atom or NR3—; R3 represents a hydrogen atom, or an monovalent hydrocarbon group having from 1 to 10 carbon atoms; and n indicates an integer of from 1 to 5.

Abstract: This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I: wherein: the substituents are as defined in the application.

Abstract: A photothermographic material comprising a support body provided on or above at least one surface thereof with an image forming layer, containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and binder, and a non-photosensitive layer, wherein: 1) 50% or more of the binder in the image forming layer is hydrophilic binder; 2) a ratio of the non-photosensitive organic silver salt to the hydrophilic binder is from 0.6 to 1.4 by mass; and 3) 70% or more of binder in the non-photosensitive layer is hydrophilic binder.

Abstract: A photothermographic material for blue light exposure that has a good coating surface condition and an image forming method for use with the photothermographic material are provided. The photothermographic material includes a support, and an image forming layer provided on at least one side of the support. The image forming layer contains at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder. The photothermographic material is characterized in that: (1) a silver iodide content of the photosensitive silver halide is not less than 40 mole %; (2) the binder is a hydrophilic binder; (3) the image forming layer contains a silver iodide complexing agent; and (4) the image forming layer contains, as a silver carrier, at least one compound represented by the following Formula (I) or (II): (wherein Q represents an atomic group that is necessary to form a 5 or 6-membered imide ring).

Abstract: The photosensitive resin composition comprising: (A) a resin containing (A1) a repeating unit having at least two groups represented by the specific general formula; and (B) a compound capable of generating an acid by the action with one of an actinic ray and a radiation.

Abstract: Exemplary embodiments of the present invention provide a method to form a patterned conductive film by modifying a conductive thin film on a substrate irrespective of the material used for the substrate. Exemplary embodiments include a substrate having a conductive layer containing a conductive material and a photothermal conversion layer containing a photothermal conversion material that converts light energy into heat energy that is irradiated with a laser beam to fire at least part of the conductive layer with the photothermal conversion material.

Abstract: A laser-engravable flexographic printing element comprising an elastomeric, relief-forming, laser-engravable, thermally and/or photochemically crosslinkable layer comprising, as binder, at least 5% by weight of syndiotactic 1,2-polybutadiene having a content of 1,2-linked butadiene units of from 80 to 100%, a degree of crystallinity of from 5 to 30% and a mean molecular weight of from 20,000 to 300,000 g/mol on a flexible, dimensionally stable support. The elastomeric, relief-forming, laser-engravable layer preferably comprises: (a) from 50 to 99.9% by weight of one or more binders as component A consisting of (a1) from 5 to 100% by weight of syndiotactic 1,2-polybutadiene having a content of 1,2-linked butadiene units of from 80 to 100%, a degree of crystallinity of from 5 to 30% and a mean molecular weight of from 20,000 to 300,000 g/mol as component A1, and (a2) from 0 to 95% by weight of further binders as component A2, (b) from 0.

Abstract: The invention provides a multi-color image-forming material for recording an image by using an image-receiving sheet having an image-receiving layer and at least 4 kinds of heat transfer sheets different from each other in color and comprising a support having provided thereon at least a light-to-heat conversion layer and an image-forming layer, superposing the image-forming layer of each of the thermal transfer sheet on the image-receiving layer of the image-receiving sheet, in which the image-forming layer is opposed to the image-receiving layer, and irradiating a laser light thereto to transfer the laser-irradiated area of the image-forming layer to the image-receiving layer of the image-receiving sheet, wherein the material contains a heat transfer sheet (X) having an image-forming layer containing one selected from among Pigment Red 48:1, Pigment Red 48:3, Pigment Green 7, Pigment Blue 15:6, Pigment Blue 60, Pigment Violet 23 and Pigment Orange 43, and a method for forming a multi-color image comprises u

Abstract: A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, at least one binder and at least one stabilizer represented by formula (I): wherein R1, R2, R3 and R4 are independently selected from the group consisting of a hydrogen atom, halogen atoms and aliphatic, alkoxy, nitro, acyl, sulfonyl, nitrile, alkaryl, aryl, amino, thioalkyl, aldehyde, urea, —O—(C?O)-alkyl, —O—(C?O)-aryl, —O—(C?O)—O-alkyl, —O—(C?O)—O-aryl, —NH—(C?O)-alkyl, —NH—(C?O)-aryl, —(C?O)—NH-alkyl, —(C?O)—NH-aryl, —NH—(SO2)-alkyl, —NH—(SO2)-aryl, —(SO2)—NH-alkyl, —(SO2)—NH-aryl groups; X is represented by -A(-M)n or is selected from the group consisting of substituted aliphatic groups, unsubstituted aliphatic groups, substituted cycloaliphatic groups, unsubstituted cycloaliphatic groups

Abstract: An infrared transceiver module for enabling a multiple direction infrared communication includes a transfer element for enlarging the working angles of infrared emission and reception of a transmitter and receiver portion. The transfer element has a surface area larger than the surface area of the transmitter and receiver portion. Infrared signal beam transmitting from the transmitter and receiver portion is repeatedly refracted by said transfer element and transmitted in multiple directions from the transfer element. Exterior signal beams coming to any portion of the transfer element are also repeatedly refracted by said transfer element and received by said transmitter and receiver portion. Therefore, a multiple direction infrared transmission and reception is obtained.

Abstract: A presensitized plate in which an image recording layer is formed on a support for a lithographic printing plate obtainable by performing a treatment with an aqueous solution containing one or more divalent or multivalent cations at a concentration ranging from 0.0001 mol/L to less than 0.020 mol/L is excellent in both scum resistance and press life when processed into a lithographic printing plate.

Abstract: Imageable elements, useful as on press developable lithographic printing plate precursors, are disclosed. The elements comprise an imageable layer over a substrate and an one or more adhesion promoting ingredients. The imageable layer comprises a polymerizable compound and a polymeric binder. The adhesion promoting ingredients are titanium chelate and/or co-polymers of a monomer having a polethylene oxide side chain with a monomer having either an acidic group or an anhydride group that has been ring opened to form an acidic group or groups.

Abstract: A planographic printing plate precursor including: a support; and an image recording layer which is disposed on the support and contains a binder polymer, a polymerization initiator, a polymerizable compound, and an IR absorber. Upon exposure with a laser beam, an exposed portion of the image recording layer in the vicinity of the surface of the image recording layer is cured, and an exposed portion of the image recording layer in the vicinity of an interface between the image recording layer and the support is not cured. A developing rate of an unexposed portion of the image recording layer by an alkaline developer having a pH of 10 to 13.5 is preferably 100 nm/sec or more, and a permeation rate of the alkaline developer to an exposed portion of the image recording layer is preferably 100 nF/sec or less.

Abstract: A positive image recording material applicable to infrared laser comprising a support whereon is formed a photosensitive/heatsensitive layer containing (A) an alkali-soluble resin, (B) a photothermal conversion substance, and (C) at least one compound selected from a group of compounds defined by the formulae (I), (II), (III), and (IV) exhibiting improved solubility to an alkaline developer following exposure with an infrared laser wherein the substituent groups of the formulae (I) to (IV) are specified in the specification for this invention.

Abstract: Disclosed are a printing plate precursor, a fabrication process of the printing plate precursor, a fabrication process of a printing plate, a regeneration process of the printing plate, a printing press, and a coating formulation for the printing plate precursor. According to the present invention, a printing plate can be fabricated directly from digital data, and sufficient image quality can be obtained without a developing step, i.e., a developer. To permit repeated use of the precursor, the precursor has a surface, which contains a photocatalyst and is capable of showing hydrophilicity when exposed to activating light having energy higher than band gap energy of the photocatalyst.

Abstract: Assemblages that comprise a donor element and a receptor are disclosed. The donor element comprises a binder and particles of a cyanoacrylate polymer. The assemblages can be thermally imaged to form lithographic printing plates.

Abstract: A process for preparing a photothermographic material with increased photosensitivity, the photothermographic material comprising a support and a photo-addressable thermally developable element, exclusive of a compound R—S(M)n wherein R is an aliphatic hydrocarbon, aryl or heterocyclic group, M is a hydrogen atom, or cation, and letter n is a number determined so as to render the molecule neutral and also exclusive of a compound capable of releasing a mobile dye corresponding to or inversely corresponding to the reduction of silver halide to silver at elevated temperatures, the photo-addressable thermally developable element containing a photosensitive agent in catalytic association with a light-insensitive organic silver salt, a reducing agent for the light-insensitive organic silver salt in thermal working relationship therewith and a binder, comprising the steps of: (i) increasing the photosensitivity of a photosensitive silver halide by chemical sensitisation with a chemical sensitising merocyanine dye co

Abstract: A polymerizable composition comprising; a dendrimer having at least two polymerizable groups within a molecule; a radical initiator; and an alkali-soluble polymer, and an image recording material comprising a support and a recording layer comprising a polymerizable composition containing a dendrimer having at least two polymerizable groups within a molecule, a radical initiator and an alkali-soluble polymer.

Abstract: Novel silver compounds can include a primary core of a photosensitive silver halide and a shell covering the primary core. This shell includes one or more non-photosensitive silver salts, each silver salt including an organic silver coordinating ligand. Other novel silver compounds are homogeneous silver salts of organic silver coordinating ligands throughout (non-core-shell). Still other silver compounds can include a primary core of a non-photosensitive metal salt and a shell covering the primary core. This shell includes one or more non-photosensitive silver salts, each silver salt including an organic silver coordinating ligand. These types of silver compounds can be used as sources of reducible silver ions in thermally developable imaging materials including thermographic and photothermographic materials.