Abstract: A photosensitive recording medium having a multiplicity of microcapsules formed on a substrate, and a developer material, each microcapsule having a photosensitive resin and a chromogenic material which reacts with the developer layer to form a colored image spot. The microcapsules comprising a plurality of microcapsule groups which are sensitive to radiations having different wavelength bands, or which are sensitive to different intensities of the radiation. An image recording system is provided with an illuminating device for generating radiations of different wavelengths falling within the wavelength bands of the microcapsule groups, or a radiation of variable intensity. The recording system has a selector for selecting at least one of the radiations of the different wavelengths, or one of the intensity levels of the radiation, in order to adjust the contrast of the images formed on the medium, with respect to non-image areas on the medium.

Abstract: A photosensitive material comprising a support having a layer of microcapsules on the surface thereof, said microcapsules containing a color precursor and a photohardenable or photosoftenable composition, and said support being a highly reflective, non-difuse polymeric film or coated paperstock.

Abstract: An image recording system wherein a capsule sheet carrying thereon a plurality of microcapsules each of which envelopes therein a developing agent pressed onto a sheet-shaped member desirably selected by a user to form a layer of a developing agent on the sheet-shaped member. Thereafter, a second capsule sheet coated with a plurality of microcapsules each of which envelopes therein a dye precursor and whose mechanical strength has been varied in accordance with the image to be recorded is pressed onto the sheet-shaped member with the layer of the developing agent. The microcapsules corresponding to the image to be recorded are ruptured and the dye precursors streamed out thereform react to the developing agent on the sheet-shaped member to develop a visible image thereon.

Abstract: A method for forming an image comprising the steps of:(a) imagewise exposing a light-sensitive material comprising a support having thereon a light-sensitive layer containing an image-forming material encapsulated in microcapsules comprising a polymer;(b) superposing thereon an image-receiving material comprising a support having thereon an image-receiving layer in contact with the outermost layer of said light-sensitive material;(c) applying sufficient pressure to said superposed materials to imagewise rupture at least part of said microcapsules, to transfer an image from said light-sensitive layer to said image-receiving layer, and to adhere said light-sensitive material and said image-receiving material to form a unitary structure; at least one of said support for said light-sensitive material and said support for said image-receiving material being transparent.

Abstract: A method for treating an imaging sheet is disclosed. The method includes the steps of providing an imaging sheet having coated on one of its surfaces a layer of microcapsules, the microcapsules containing a radiation curable composition and having an image-forming agent associated therewith, heating the sheet; and image-wise exposing the layer of microcapsules to actinic radiation; wherein the heating step is performed prior to or after the image-wise exposing step. The method reduces or removes damage defects on the imaging sheet and, in some instances, extends the dynamic range of the image-forming agents.

Abstract: A photo and pressure sensitive recording medium comprising a base sheet, supporting thereon a color developing agent which reacts with a dye precursor to develop color and an adhesive substance with which the recording medium may be adhered to any suitable material or body. The color developing agent may be coated on one surface of the base sheet and adhesive is applied on the other surface of the base sheet. The adhesive substance may be of thermoplastic type or enveloped in microcapsules crushable under pressure. A peel-off sheet may be conted on the adhesive substance. Alternatively, the color developing agent and the adhesive substance may both be supported on one surface of the base sheet, as well as photo-curable microcapsules containing the dye precursor.

Abstract: A developer sheet useful in forming reproductions which have a controllable gloss finish or in forming transparencies comprising a support having a layer of a finely divided, thermoplastic, developer material on the surface thereof, said developer material being capable of reacting with a color precursor to produce a visible image and being capable of coalescing into a thin film which imparts gloss to said image upon application of heat and/or pressure.The developer sheet comprising a support having a layer of a finely divided thermoplastic developer material on the surface thereof can additionally comprise oil-containing microcapsules such that upon microcapsule rupture, the oil plasticizes the developer material.

Abstract: A color image forming process wherein images are formed by reaction of cyan, magenta and yellow color precursors with a developer material, the reaction is image-wise controlled by image-wise exposure of a photosensitive composition encapsulated in pressure rupturable capsules, image-wise exposure of the photosensitive composition and rupture of the capsules releases the color precursor for patterned reaction with the developer material.

Abstract: An imaging system in which images are formed by image-wise exposing a layer containing a chromogenic material and a photosensitive composition in which at least the photosensitive composition is encapsulated in a layer of pressure rupturable capsules. Exposure and capsule rupture renders the chromogenic material image-wise accessible to the developer for a patterned image forming reaction.

Abstract: In a transfer-type photo-sensitive sheet including; a photo-sensitive sheet coated with plurality microcapsules, each microcapsule encapsulating chromogenic material and photo-sensitive resin, and a transfer sheet coated with developing agent which causes development reaction in contact with chromogenic material effused from the microcapsules on the photo-sensitive sheet under pressure, wherein the photo-sensitive sheet is larger than the transfer sheet in size, an improvement characterized by that the microcapsules are only coated on equal to or less than the area, superimposed on the transfer sheet, of the photo-sensitive sheet.

Abstract: A transfer imaging system is disclosed wherein images are formed by image-wise exposing a layer comprising a chromogenic material and pressure rupturable capsules containing, as an internal phase, a photosensitive composition. In a preferred embodiment, the chromogenic material is encapsulated with the photosensitive composition. Upon exposure and capsule rupture the chromogenic material is image-wise transferrable to a developer or copy sheet where the chromogenic material reacts with a developer to form an image. Preferred systems are sensitive to U.V. or blue light in the wavelength range of 380 to 480 nm.

Abstract: A multicolor imaging material comprises a substrate, a capsule layer made up of a plurality of heat-meltable microcapsules including color former and a developer material layer. When the laser beams having wavelengths of .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 are applied to the multicolor imaging material according to the signals corresponding to three primary colors, the heat-meltable microcapsules for individual colors independently generate heat, thereby causing the heat-meltable substance to be melted. This brings about the reaction of the color formers for individual colors with the developer to developer colors, thereby forming a color image comprised of cyan, magenta and yellow.

Abstract: Disclosed is a method of recording a picture onto a photosensitive and pressure-sensitive paper, which comprises the steps of: forming in advance a mask original form of a film having a light-transmitting portion and a non-light-transmitting portion corresponding to information of the picture; exposing the photosensitive and pressure-sensitive paper through the mask original form to thereby form a latent image on the photosensitive and pressure-sensitive paper; and pressure-fixing the photosensitive and pressure-sensitive paper carrying the latent image formed thereon.

Abstract: A photosensitive recording medium having a multiplicity of microcapsules formed on a substrate, and a developer material, each microcapsule having a photosensitive resin and a chromogenic material which reacts with the developer layer to form a colored image spot. The microcapsules comprise a plurality of microcapsule groups which are sensitive to radiations having different wavelength bands, or which are sensitive to different intensities of the radiation. An image recording system is provided with an illuminating device for generating radiations of different wavelengths falling within the wavelength bands of the microcapsule groups, or a radiation of variable intensity. The recording system has a selector for selecting at least one of the radiations of the different wavelengths, or one of the intensity levels of the radiation, in order to adjust the contrast of the images formed on the medium, with respect to non-image areas on the medium.

Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent, a polymerizable compound and a leuco dye provided on a support, characterized in that the leuco dye is a compound having the following formula (I): ##STR1## in which A is --O--or ##STR2## and R is a substituent having a positive substituent constant (.sigma.); each of R.sup.1 and R.sup.2 is an alkyl group, a cycloalkyl group or an aralkyl group; each of R.sup.3, R.sup.4 and R.sup.5 is an alkyl group, an alkoxy group, a cycloalkyl group, an aralkyl group or an aryloxy group; each of k, l and n is 1 or 2; and m is 0, 1 or 2.

Abstract: A silver halide color reversal reflection print photosensitive material comprises at least one blue-sensitive layer, at least one green-sensitive layer and at least one red-sensitive layer on a support. In the characteristic curves of the color sensitive layers, a fluctuation width of point-gammas and absolute values of point-gammas are defined. The distribution of the grain size of the silver halide grains in silver halide emulsions contained in the color sensitive layer can be controlled by forming the grains in the presence of a silver halide solvent.

Abstract: Disclosed is photo- and pressure-sensitive recording paper which comprises a support coated with first microcapsules each enclosing contents including a substance which has hardness changeable corresponding to a quantity of light irradiation thereon and which includes a dye precursor, and with second microcapsules each enclosing a developer which is a thermoplastic substance, and further disclosed is a pressure developing apparatus suitable for pressure developing such photo- and pressure-sensitive recording paper as described above.

Abstract: The present invention provides a transfer imaging sheet wherein an image is invisible in visible light but apparent under ultraviolet or infrared radiation. The transfer imaging sheet comprises an imaging sheet having a coating on one surface thereof of an image forming agent selected from the group consisting of an ultraviolet-readable fluorescer and an infrared-readable dye, and a radiation curable composition which undergoes an increase in viscosity upon exposure to actinic radiation. The radiation curable composition is encapsulated in rupturable microcapsules as an internal phase, and preferably, the image forming agent is encapsulated with the radiation curable composition.

Abstract: A photosensitive and pressure-sensitive recording sheet and a process for recording an image using such recording sheet, said recording sheet comprising microcapsules, which enclose a first component, held on one side surface of a sheet and a second component, which causes color change of the surface of sheet when it reacts with the first component that is held on said one side surface of the sheet, held on the opposing side surface of the sheet and, moreover, one other component, which causes a change in the mechanical breaking strength of the microcapsule in response to exposure to light, enclosed in the microcapsules; and said process comprising exposing said one side surface of the sheet holding the microcapsules to a light, putting the so exposed surface of the sheet together with the surface, which holds the second component, of another recording sheet of the same construction and pressing the so laminated two sheets with each other.

Abstract: A developer sheet having reduced tack useful in forming reproductions having a controllable gloss finish or in forming transparencies is provided. The developer sheet has a support with a layer on the surface of the support of a finely divided thermoplastic developer material and a non-reactive, non-scattering pigment. The developer material is capable of reacting with a color precursor to produce a visible image while the pigment reduces tack. Both the developer material and the pigment are capable of forming an essentially transparent film upon the application of heat and/or pressure.

Abstract: A photosensitive and pressure-sensitive recording material, which comprises (A) a first layer coated on a sheet and containing microcapsules including a first reaction component for a color developing reaction and a component capable of altering the mechanical breaking strength of the microcapsule in response to exposure to light, (B) a second layer coated on the same or different sheet and containing a second reaction component for said color developing reaction brought about upon contact thereof with said first reaction component for building up an image corresponding to an exposed patterned light and (C) an ultraviolet ray absorbing agent contained in said first and/or the second layer.

Abstract: The present invention provides a photosensitive material having a support, a layer containing opacifying agent, a layer containing microcapsules and a layer of developer material. The layer containing opacifying agent, the layer containing microcapsules and the layer of developer material are positioned such that upon rupturing the microcapsules, the color former diffuses to the developer material layer to form an image in the developer material layer. The final image is viewed against the opacifying agent.

Abstract: An imaging sheet useful in forming images on plain paper, said sheet comprising a support having a plurality of photosensitive microcapsules and a developer-containing resin on the surface thereof, said microcapsules and said developer-containing resin being present in the same layer or in contiguous layers on the surface of said support, said microcapsules containing an internal phase which includes a photosensitive composition which changes in viscosity in response to exposure to actinic radiation and a color former which is capable of reacting with said developer and forming a visible dye image, said imaging sheet being useful in forming images by a process which comprises image-wise exposing said imaging sheet to actinic radiation, assembling said imaging sheet with a sheet of plain paper, heating said assembly, subjecting the assembly to a uniform rupture and transfer force, and separating said imaging sheet from said paper such that said image areas are area-wise transferred to said plain paper.

Abstract: An imaging sheet useful in forming images on plain paper, said sheet comprising a support having a plurality of photosensitive microcapsules and a developer-containing resin on the surface thereof, said microcapsules and said developer-containing resin being present in the same layer or in contiguous layers on the surface of said support, said microcapsules containing an internal phase which includes a photosensitive composition which changes in viscosity in response to exposure to actinic radiation and a color former which is capable of reacting with said developer and forming a visible dye image, said imaging sheet being useful in forming images by a process which comprises image-wise exposing said imaging sheet to actinic radiation, assembling said imaging sheet with a sheet of plain paper, heating said assembly, subjecting the assembly to a uniform rupture and transfer force, and separating said imaging sheet from said paper such that said image areas are area-wise transferred to said plain paper.

Abstract: Images can be formed on a receptor sheet by transfer of a dye image. The positive dye image is formed by bleaching of dye with an iodonium ion. The positive dye image is then transferred by sublimation or diffusion onto a receptor sheet.

Abstract: A silver halide photographic light-sensitive material comprising a support having provided thereon at least one internal latent image type direct positive silver halide emulsion layer is disclosed, wherein(1) said internal latent image type direct positive silver halide emulsion layer comprises at least two layers having substantially the same color sensitivity, or(2) at least said internal latent image type direct positive silver halide emulsion and a solid pigment-containing layer contiguous thereto, which is positioned on the side opposite to the side of the silver halide emulsion layer to be exposed, are provided,and wherein at least one internal latent image type direct positive silver halide emulsion in (1) or (2) has a binder/silver halide (calculated as silver) ratio by weight of more than 1.25.

Abstract: A photosensitive transfer imaging system comprising an imaging sheet and a developer sheet; the imaging sheet incudes a photographic support, a layer of photosensitive microcapsules on one surface of the support wherein the microcapsules have a discrete capsule wall and contain a chromogenic material and a photosensitive composition such as a polyethylenically unsaturated compound and a photoinitiator; the developer sheet includes a support member and a layer of a developer composition such as a salicylic acid salt; the imaging sheet and/or the developer sheet additionally includes a plurality of microcapsules which contain an oil in which the chromogenic material is soluble; images are formed by image-wise exposing the imaging sheet to actinic radiation and rupturing the microcapsules in contact with the developer sheet whereupon the chromogenic material is image-wise transferred to the developer sheet.

Abstract: An imaging material employing an encapsulated radiation sensitive composition which undergoes a change in viscosity upon exposure having a sensitivity (log E) less than 4.0; images are formed by exposing the material to actinic radiation and rupturing the capsules whereby the internal phase is released from the capsules and participates in forming an image.

Abstract: A transfer imaging system employing photosensitive microcapsules useful in obtaining high gloss images wherein the developer sheet is overcoated with a discontiuous layer of a thermoplastic polymeric pigment which is fused into a thin essentially transparent polymeric film following development.

Abstract: A transfer imaging system is disclosed wherein images are formed by image-wise exposing a layer comprising a chromogenic material and pressure rupturable capsules containing, as an internal phase, a photosensitive composition. In a preferred embodiment, the chromogenic material is encapsulated with the photosensitive composition. Upon exposure and capsule rupture the chromogenic material is image-wise transferrable to a developer or copy sheet where the chromogenic material reacts with a developer to form an image. Preferred systems are sensitive to U.V. or blue light in the wavelength range of 380 to 480 nm.

Abstract: An imaging system in which images are formed by image-wise exposing a layer containing a chromogenic material and a photosensitive composition in which at least the photosensitive composition is encapsulated in a layer of pressure rupturable capsules. Exposure and capsule rupture renders the chromogenic material image-wise accessible to the developer for a patterned image forming reaction.

Abstract: An improved means for exposing and developing photosensitive sheets employing a microencapsulated radiation sensitive composition wherein a cover sheet is adhered to a layer of the microcapsules and following exposure the cover sheet is peeled away to rupture the microcapsules and develop the image. The cover sheet also reduces the oxygen concentration at the surface of the microcapsules and thereby enhances the sensitivity of the imaging sheet.

Abstract: An imaging material of the type in which a radiation sensitive composition is encapsulated in a plurality of microcapsules and exposure controls the release of the internal phase from the microcapsules and mobilization of an image-forming agent in which faster toe speed and higher gamma are obtained by sequestering a predetermined amount of the image-forming agent mobilized upon rupturing the microcapsules.

Abstract: An imaging material in which images are formed by exposing a sheet having on a surface a layer of microcapsules containing a radiation sensitive internal phase, and rupturing the microcapsules; wherein images in the form of transparent windows are formed in an opaque image-receiving layer containing a light-scattering pigment by rendering the pigment transparent with the internal phase released from the ruptured microcapsules.

Abstract: A photosetting microcapsule containing a photosetting resin and a photopolymerization initiator can be controlled in rupture thereof. By utilizing such characteristics of said microcapsule and by using in combination said photosetting microcapsules containing a reactant such as an electron donative compound and the microcapsules containing a co-reactant such as an electron receptive compound capable of forming a colored material by reacting with said reactant or finely powdered co-reactant per se, there is provided a photo- and pressure-sensitive recording sheet which is capable of copying even a positive type original to provide a copy or copies with excellent keeping quality without causing any coloration or discoloration in the portion other than the characters, etc., of the original.

Abstract: A process for improving the sensitivity of imaging materials employing an encapsulated radiation sensitive composition including a photoinitiator; wherein the imaging material is subjected to a uniform exposure which does not produce images but sequesters oxygen present in the capsules and converts it to a non-inhibiting form. An imaging material is also disclosed wherein the radiation sensitive composition additionally includes an oxygen sequestering agent.

Abstract: Coating for infrared transparency films and thermally imageable films and films prepared with such coating. The coating comprises a copolymer formed from (a) at least one fluorocarbon monomer and (b) at least one monomer which imparts hardness to the copolymer. The coating serves to prevent the transfer of toner powder from an original which is in actuality an electrophotographic copy to the transparency film. The copolymer may contain from about 12 percent to about 85 percent fluorocarbon monomer, the remainder being the monomer which imparts hardness to the coating. Suitable monomers for imparting hardness to the copolymer include acrylates, methacrylates, acrylamides, methacrylamides, acrylonitriles, methacrylonitriles, and styrenes.

Abstract: An imaging system in which images are formed by image-wise exposing a layer containing a chromogenic material and a photosensitive composition in which at least the photosensitive composition is encapsulated in a layer of pressure rupturable capsules. Exposure and capsule rupture renders the chromogenic material image-wise accessible to the developer for a patterned image forming reaction.

Abstract: A capsular imaging system wherein the imaging material comprises a support coated on one surface with a layer of capsules containing, as an internal phase, a radiation sensitive composition and a decolorizing agent; images are formed by a dry process wherein the aforesaid sheet is image-wise exposed; exposure of the sheet controls release of the decolorizing agent from the capsules which image-wise reacts with a dye layer and causes a color change. Embodiments are also disclosed in which the decolorizing agent inhibits or reverses the color forming reaction between a dye precursor and a dye developer.

Abstract: A transfer imaging system is disclosed wherein images are formed by image-wise exposing a layer comprising a chromogenic material and pressure rupturable capsules containing, as an internal phase, a photosensitive composition. In a preferred embodiment, the chromogenic material is encapsulated with the photosensitive composition. Upon exposure and capsule rupture the chromogenic material is image-wise transferrable to a developer or copy sheet where the chromogenic material reacts with a developer to form an image. Preferred systems are sensitive to U.V. or blue light in the wavelength range of 380 to 480 nm.

Abstract: The invention relates to a dry transfer process which employs ultraviolet light and photosensitive materials.The transfer materials used comprise a donor complex layer (c) and a receptor layer (c1). The donor complex layer (c) comprises a carrier (1), a priming layer (2), signs or imprints (3) produced by means of a colorless color-producing material, and a barrier layer (4) which is degradable under the action of ultraviolet light. The receptor layer (c1) comprises a carrier 6 coated with a layer (5) comprising a color developer.The transferred symbols or images (7) are obtained without the physical passage of an element or of an image from the donor layer to the receptor layer; their quality is comparable to that of printed characters.

Abstract: A radiation-sensitive element is disclosed including a radiation-sensitive layer comprised of a cobalt(III)complex and a photoreductant. A process is disclosed in which the photoreductant is converted to a reducing agent by exposure to electromagnetic radiation longer than 300 nanometers. The reducing agent is then reacted with a cobalt(III)complex. Images can be recorded directly within the radiation-sensitive layer or in a separate image-recording element or layer by use of the residual cobalt(III)complex not exposed or one or more of the reaction products produced by exposure. By using the ammonia liberated from ammine ligand containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the radiation-sensitive layer. By the selection of amine-responsive reducing agent precursors, the amines released by the cobalt(III)complexes cause an amplified image.

Abstract: A photographic assembly for the photographic diffusion transfer process is provided wherein a stripping layer is used consisting of a graft copolymer of gelatin which has been substantially fully reacted with a dicarboxylic acid anhydride selected from phthalic anhydrides, succinic anhydrides, glutaric anhydrides and a monomer of a vinyl ester, a vinyl ether, an acrylic ester, an acrylic ether, a methacrylic ester or a methacrylic ether or a mixture thereof. These stripping layers exhibit good dry adhesion to the emulsion layer and to the mordant layer and moderate wet adhesion.

Abstract: A radiation-sensitive element is disclosed including a radiation-sensitive layer comprised of a cobalt(III)complex and a photoreductant. A process is disclosed in which the photoreductant is converted to a reducing agent by exposure to electromagnetic radiation longer than 300 nanometers. The reducing agent is then reacted with a cobalt(III)complex. Images can be recorded directly within the radiation-sensitive layer or in a separate image-recording element or layer by use of the residual cobalt(III)complex not exposed or one or more of the reaction products produced by exposure. By using the ammonia liberated from ammine ligand containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the radiation-sensitive layer.

Abstract: A radiation-sensitive element is disclosed including a radiation-sensitive layer comprised of a cobalt(III)complex and a photoreductant. A process is disclosed in which the photoreductant is converted to a reducing agent by exposure to electromagnetic radiation longer than 300 nanometers. The reducing agent is then reacted with a cobalt(III)complex. Images can be recorded directly within the radiation-sensitive layer or in a separate image-recording element or layer by use of the residual cobalt(III)complex not exposed or one or more of the reaction products produced by exposure. By using the ammonia liberated from ammine ligand containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the radiation-sensitive layer. By the selection of amine-responsive reducing agent precursors, the amines released by the cobalt(III)complexes cause an amplified image.

Abstract: A direct positive silver halide photographic light-sensitive material is described, comprising a support having coated thereon a light-sensitive silver halide photographic emulsion layer and a hydrophilic colloid layer, at least one of said layers containing a compound represented by the formula (I): ##STR1## wherein R.sup.1 represents R.sup.6 or R.sup.6 CO--; and R.sup.6 represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or hydrogen; R.sup.2 and R.sup.4, which may be the same or different, each represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or a hydrogen atom; or R.sup.1 and R.sup.2 together can form a ring; R.sup.3 represents hydrogen or an aliphatic group; R.sup.5 represents Y or X--A--Y wherein X and Y, which may be the same or different, each represents a divalent aromatic group; and A represents a divalent group selected from --CONH--, --NHCONH--, --SO.sub.2 NH--, --B--CONH-- and --B--SO.sub.

Abstract: The light stability of organic dyes is improved by the presence of at least one of the complexes represented by general formula (I) or (II) ##STR1## wherein M represents a Cu, Co, Ni, Pd or Pt atom; R.sup.1 and R.sup.4, which may be the same or different, each represents an alkyl group or an aryl group; R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom, an alkyl group or an aryl group; or R.sup.1 and R.sup.2, and R.sup.3 and R.sup.4 may combine to represent a non-metallic atomic group necessary to form a 6-membered ring; and Z represents a non-metallic atomic group necessary to form a 5-membered ring, 6-membered ring, 8-membered ring, or 10-membered ring.

Abstract: A method of stabilizing organic substrate materials having an absorption maximum in the wavelength region of about 300 nm to about 800 nm to light which comprises making coexist with the organic substrate at least one metal complex salt represented by the following general formula (I): ##STR1## wherein Cat represents a divalent or a monovalent cation, and n is 1 or 2. A photographic material thus stabilized is also disclosed.

Abstract: A method of stabilizing an organic substrate material such as a photographic dye against the action of light having an absorption maximum between about 300 nm and about 800 nm in wavelength by making co-exist with the organic substrate material at least one compound represented by the formula (I) defined in the specification is disclosed.

Abstract: A method of stabilizing an organic substrate material having an absorption maximum in the wavelength region of about 300 nm to about 800 nm to light without detracting from the color hue and the purity of the organic substrate material, which comprises making at least one metal complex salt represented by the following formula (I) coexist with the organic substrate material: ##STR1## wherein M represents a Cu, Co, Ni, Pd or Pt atom; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.6, R.sup.7, R.sup.8 and R.sup.9 each represents a hydrogen atom, a halogen atom or a cyano group, or an alkyl group, an aryl group, a cycloalkyl group or a heterocyclic ring which may be attached directly to the carbon atom in the respective ring or through a divalent coupling group, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4, R.sup.6 and R.sup.7, R.sup.7 and R.sup.8, or R.sup.8 and R.sup.9 may combine to form the non-metal atoms necessary to complete a 6-membered ring; R.sup.