Abstract: A healthy gas generating system for generating healthy gas for inhalation by a user includes an electrolysis device, a gas mixing device, and a backfire barrier. The electrolysis device electrolyzes water to generate a gas with hydrogen. The gas mixing device includes a mixer and a vibrator for mixing the combination gas with an atomized gas to produce the healthy gas. The backfire barrier is configured on the output of the gas mixing device or the gas passage of receiving the combination gas to avoid the backflow of the gas.

Abstract: A transfer material colored to a predetermined color is used when images are formed on a transfer material for use in thermal transfer comprising a substrate and a dye receiving layer by a thermal transfer process.When images are formed by an optional image forming method such as silver salt photographic process, ink jet process or thermal transfer process, a transfer material having sepia tone is used in each of the image forming processes thereby forming sepia tone images. Images having unique appearance can be formed easily upon forming images by a thermal transfer process. Images of sepia tone can be formed safely and conveniently.

Abstract: A transfer material colored to a predetermined color is used when images are formed on a transfer material for use in thermal transfer comprising a substrate and a dye receiving layer by a thermal transfer process.When images are formed by an optional image forming method such as silver salt photographic process, ink jet process or thermal transfer process, a transfer material having sepia tone is used in each of the image forming processes thereby forming sepia tone images. Images having unique appearance can be formed easily upon forming images by a thermal transfer process. Images of sepia tone can be formed safely and conveniently.

Abstract: There are described diffusion transfer photosensitive film units which include a novel antihalation layer comprising an antihalation material, titanium dioxide and a binder. Diffusion transfer film units prepared according to the invention provide silver images of enhanced resolution, film speed and sharpness.

Abstract: A transfer material colored to a predetermined color is used when images are formed on a transfer material for use in thermal transfer comprising a substrate and a dye receiving layer by a thermal transfer process.When images are formed by an optional image forming method such as silver salt photographic process, ink jet process or thermal transfer process, a transfer material having sepia tone is used in each of the image forming processes thereby forming sepia tone images. Images having unique appearance can be formed easily upon forming images by a thermal transfer process. Images of sepia tone can be formed safely and conveniently.

Abstract: There are described novel photographic processing compositions, film units and processes for use in diffusion transfer photographic systems. More particularly, there is described a method for forming a diffusion transfer image photographic processing of diffusion transfer photographic film units in the presence of hypoxanthine and inosine. Diffusion transfer photographic systems utilizing the novel photographic element or method of the present invention exhibit substantially fewer, if any, crystals on the final image of the finished photograph post-processing.

Abstract: A method is disclosed for the the formation of a photo mode image based on a the introduction on exposure of a difference of tackiness in a photosensitive layer which contains a reducible silver salt such as silver behenate. After exposure the still tacky parts selectively take up a reactive toner containing a reducing agent. By means of a heat post-treatment density is built up by reduction of the organic silver salt. This density can be increased by the presence in the toner of a pigment, preferable carbon black. In this way high maximal densities can be obtained. In a preferred embodiment the difference in tackiness is introduced by image-wise photopolymerization of a monomer also present in the photosensitive layer.

Abstract: The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei and developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid characterized in that said development is carried out in the presence of a meso-ionic compound. The present invention further provides an imaging element and alkaline processing liquid for use in said method.

Abstract: An image formation method by silver salt diffusion transfer is described, which comprises subjecting a photosensitive element containing at least one photosensitive silver halide emulsion layer to image exposure, then developing the photosensitive element by use of an alkali processing composition containing a solvent for a silver halide to turn at least a part of unexposed silver halide of the photosensitive silver halide emulsion layer into a transferable silver complex salt, transferring at least a part of the transferable complex salt to a silver precipitating nucleus-containing image receiving layer to form an image on the silver precipitating nucleus-containing image receiving layer, and separating the silver precipitating nucleus-containing image receiving layer from the photosensitive element after image formation to obtain the image, wherein the image is formed in the presence of at least one compound represented by the following formula (I) and at least one compound represented by the following form

Abstract: Toning agents are provided for use in thermographic and photothermographic materials, either on their own or in combination with at least one other toning agent, with improved compatibility with hydrophobic media as shown by reduced crystallization and reduced diffusion through the material, which properties enabling an improved imaging performance to be achieved and in particular a more neutral image tone after storage.

Abstract: An image formation process uses two light-sensitive elements comprising first and second adhesive light-sensitive layers which become nonadhesive upon exposure to light, respectively, and first and second toner elements comprising toner layers (a') and (b') of hues (a) and (b), respectively.

Abstract: The present invention provides a method for making an offset printing plate according to the silver salt diffusion transfer process having improved printing properties comprising the step of developing an imaging element comprising in the order given (i) a hydrophilic base, (ii) an image receiving layer containing physical development nuclei and (iii) a photosensitive layer containing a silver halide emulsion in the presence of a 1-phenyl-5-mercapto-tetrazole, being substituted by one or two substituents from the group consisting of:(i) a --COOM group with M representing hydrogen, a metal cation, or an ammonium group,(ii) a --SO.sub.3 M.sup.1 group, M.sup.1 representing hydrogen, a metal cation, or an ammonium group,(iii) an acylamido group,(iv) and a substituent containing at least one of the aforementioned substituents (i)-(iv).

Abstract: The present invention provides a method for making a lithographic printing plate accordig to the silver salt diffusion transfer process comprising the steps of:image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei,developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid andneutralizing the thus obtained developed imaging element using a neutralization liquid characterized in that said neutralization liquid contains a meso-ionic compound.

Abstract: The present invention provides an image receiving material comprising on a support an image receiving layer containing physical development nuclei characterised in that said image receiving material contains a nacreous pigment in said image receiving layer and/or in an optional layer between said support and said image receiving layer. Excellent contone images with an antique look can be obtained with such an image receiving material in a silver salt diffusion transfer process.

Abstract: The invention provides a diffusion transfer receiver comprising a support with a non-light-sensitive image receiving layer coated onto each face thereof, said image receiving layer in each case comprising a catalytic nuclei layer for physical development of transferred complexed silver halide and each composite comprising a diffusion modifying active component which is preferably a tone controlling compound. The composites of Side 1 and Side 2 are different constitutions so as to provide receivers suitable for different end users. For example Side 1 can be made suitable for creative designers while Side 2 can be made suitable for pre-sensitized plate-makers.The invention also provides a method for improving transmission density of a receiver sheet in a non-light-sensitive image receiving layer of a silver diffusion transfer process which method comprises utilizing in the receiver layer an S-thiuronium alkyl sulfonate transmission density enhancer.

Abstract: A method for sorting images by silver salt diffusion transfer comprisingimagewise exposing a light-sensitive element comprising a light-sensitive silver halide emulsion layer,developing the light-sensitive element in the presence of a silver halide solvent using an alkaline processing composition to turn at least a part of unexposed silver halide of the light-sensitive silver halide emulsion layer into a transfer silver halide complex salt, andtransferring at least a part of the silver halide complex salt to an image receiving layer comprising a silver precipitating agent to form images on the image receiving layer,wherein at least one compound represented by formula (I) is added to at least one of the light-sensitive element, an image receiving element comprising the image receiving layer, and the processing composition in an amount of at least 1.times.10.sup.-6 and less than 1.times.10.sup.-2 mol based on one mol of silver applied per unit area (m.sup.

Abstract: A method for making a lithographic printing plate which comprises the steps of A) imagewise exposing a light sensitive material which comprises a support, a negative working silver halide emulsion layer and a surface physical development nucleating layer on said support, and B) processing the exposed material in a silver complex diffusion transfer developer containing a water soluble iodide to produce a non-black oleophilic silver image on the surface of said printing plate.

Abstract: The present invention provides a method for making a lithographic printing plate according to the DTR-process comprising the steps of:information-wise exposing an imaging element comprising on a support in the order given a photosensitive layer containing a silver halide emulsion and a layer containing physical development nuclei;developing said information-wise exposed imaging element in the presence of developing agent(s) and silver halide solvent(s)characterized in that said silver halide emulsion comprises said silver halide in an amount of at least 2 g/m.sup.2 (expressed as AgNO.sub.3), said development is carried out in the presence of a physical development restraining compound and wherein imaging elements comprising a positive working silver halide emulsion of the internal latent image type are excluded. Lithographic printing plates with substantially improved printing endurance are obtained.

Abstract: Disclosed is a processing solution used for making lithographic printing plates by silver complex diffusion transfer process which contains at least one thioether derivative represented by the following formulas (I), (II) and (III): ##STR1## wherein n.sub.1 and n.sub.2 each represents 0, 1 or 2 and R.sub.1 and R.sub.2 each represents an alkylene group of 1-5 carbon atoms, ##STR2## wherein R.sub.1 represents an alkylene group of 1-5 carbon atoms, X represents a hydrogen atom, a carboxy group, an alkoxycarbonyl group, a carbamoyl group, a hydroxy group, or --OR.sup.2 in which R.sup.2 has the same meaning as --R.sub.1 --S).sub.n CH.sub.2 CH.sub.2 OH above, and n represents 0, 1 or 2, ##STR3## wherein X' represents an aromatic or heterocyclic group which has a carboxy group, R.sub.1 and R.sub.2 each represents an alkylene group of 1-5 carbon atoms and n represents 0, 1, 2 or 3.

Abstract: A film unit for use in a silver salt diffusion transfer image-forming process is disclosed. The film unit includes a light-sensitive element, an alkaline treating element, and an image-receiving element. The light-sensitive element includes a light-sensitive silver halide emulsion layer containing a light-sensitive silver halide emulsion which contains silver bromoiodide or silver bromoiodochloride having a silver iodide content of 0.5 to 3.5 mol %, wherein silver bromoiodide having a silver iodide content of 1 to 5 mol % is formed on the surface of the silver halide grains in an amount of from 3 to 10% on a silver basis after completion of chemical sensitization. The alkaline treating element contains a water-soluble iodide in an amount of from 0.3 to 3.0 mM/l and tetrahydrophyrimidinethione in an amount of from 0.3 to 3.0 mM/l. The film unit allows rapid completion of transfer images without loss of photographing sensitivity.

Abstract: Provided is an image receiving material for silver complex diffusion transfer process which comprises a support, an image receiving layer provided on the support and an upper layer provided on the image receiving layer wherein physical development nuclei are distributed densely in the vicinity of the surface of the support and gradually diminishing towards the upper layer and a color toning agent is contained densely in the upper layer and gradually diminishing towards the surface of the support and the physical development nuclei and the color toning agent are thus mutually distributed. The image receiving material is produced by coating on a support a hydrophilic colloid coating solution for image receiving layer which contains physical development nuclei and contains substantially no color toning agent and thereon at least one hydrophilic colloid coating solution which contains at least one color toning agent and contains substantially no physical development nuclei.

Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein wherein said liquid contains a mixture of alkanolamines, the said mixture consisting of (I) N-methyl-diethanolamine and of (II) N,N-dimethyl-ethanolamine in a total amount in the range from 0.3 mol/l to 1.5 mol/l, and in a molar ratio of (I) to (II) from 1/20 to 20/1.

Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.3 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount from 0 mol % to 5 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.

Abstract: A method for forming an image by silver salt diffusion transfer is described, comprises processing an imagewise exposed photosensitive element provided with a layer of photosensitive silver halide emulsion on a support, and an image-receiving element provided with an image-receiving layer containing a silver-precipitating agent on a support, with an alkali processing composition in the presence of a silver halide solvent, to convert at least part of the unexposed silver halide in the emulsion layer into a transferable silver complex salt, to transfer at least part of said complex salt into the image-receiving layer, and to form an image in the image-receiving layer; the processing being carried out in the presence of at least one compound as described.

Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.15 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount higher than 5 mol % but not higher than 100 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.

Abstract: Disclosed is a silver complex diffusion transfer process which comprises processing a photosensitve material comprising a support and at least a silver halide emulsion layer provided thereon and an image receiving material comprising a support and at least an image receiving layer provided thereon which are brought into close contact with each other in a developing processing solution. This process is characterized in that said image receiving layer has 1-3 g/m.sup.2 of a hydrophilic colloid at least 80% by weight of which is gelatin; total amount of hydrophilic colloid present on the emulsion layer side of the photosensitive material is 5-8 g/m.sup.2 ; when the materials are immersed in a 0.1N aqueous sodium hydroxide solution at 20.degree. C. for 1 minute, amount of absorbed solution per 1 g of hydrophilic colloid is 3.

Abstract: A non-light-sensitive image-receiving element useful in a silver complex diffusion transfer process includes at least one layer containing certain S-thiuronium alkyl sulfonates which act as tone controlling agents that accelerate the physical development of silver.

Abstract: Process for the production of a laminated article including a sheet support bearing a silver image produced by the silver complex diffusion transfer process in a layer containing developement nuclei, wherein such supported image is heat-laminated with a protective thermoplastic resin layer of sheet that covers it. The heat-lamination of the nuclei-containing layer with the silver image therein takes place in the presence of at least one of certain heterocyclic black-toning agents which are effective to prevent degradation of the neutral black coloration and density loss of the silver image as a result of heat-lamination.

Abstract: A non-light-sensitive image-receiving element useful in a silver complex diffusion transfer process includes at least one layer containing certain tone controlling agents that accelerate the physical development of silver. Compounds useful for this purpose are alkyl disulfides substituted by a water solubilizing group, thiazolidine carboxylic acids, .gamma.-thiobutyrolactones, higher alkyl thioglycolates, and carboxy-substituted rhodanines.

Abstract: A method of forming images by silver salt diffusion transfer in which a photosensitive element which contains an imagewise exposed photosensitive silver halide emulsion layer is developed in the presence of a silver halide solvent using an alkaline processing composition, wherein at least part of the unexposed silver halide of the emulsion layer is formed into a transferable silver complex salt, at least part of the transferable silver complex salt is transferred to an image receiving layer to yield an image in the image receiving layer, wherein non-photosensitive silver precipitation nuclei are included in the photosensitive element. It is possible to obtain images without metallic luster in a stable manner.

Abstract: A method for processing an imagewise exposed photographic silver halide emulsion material using a receptor element for complexed silver halide which element contains a stabilizing agent corresponding to one of the following general formulae (I) or (II), tautomeric structures or a precursor form thereof: ##STR1## wherein: X represents hydrogen, alkali metal, ammonium or organic amine,Z represents the non-metallic atoms necessary to form a 5- or 6-membered heterocyclic nucleus, andeach of R.sup.1 and R.sup.2 (same or different) represents hydrogen, amino, alkyl, alkenyl, cycloalkyl, aryl, alkoxy, alkylthio, alkylsulfonyl, sulfamoyl, acyl, --SH or a heterocyclic group.

Abstract: An image receiving element for use in a silver salt diffusion transfer process comprising at least an alkali neutralization layer, a neutralization timing layer and an image receiving layer containing silver precipitation nucleus material in regenerated cellulose obtained by saponfying a cellulose ester with a substantially water free alkaline solution after coating disposed on a support in the recited order, wherein the alkaline solution contains from 1 to 20% by weight of a polyhydric alcohol having two or more hydroxyl groups or a derivative thereof. Saponification carried out for forming the image forming layer can be kept from progressing into the layers situated below, thereby enabling the obtainment of satisfactory image receiving sheets with less increase in stains, less density lowering in the storage stability, and less change in the tone.

Abstract: A method of forming an image by silver salt diffusion transfer comprising (a) developing a light-sensitive element including an imagewise exposed light-sensitive silver halide emulsion layer with an alkali processing solution comprising a silver halide solvent to convert at least a portion of unexposed silver halide in the emulsion layer into a transferable silver complex salt, and (b) transferring at least a portion of the silver complex salt to an image-receiving element containing a silver precipitating agent to form an image on the image-receiving layer, wherein the processing is carried out in the presence of an organic phosphonic acid compound.

Abstract: Image-receiving material for use in diffusion transfer reversal processing comprising a polyvinyl chloride resin support coated with a hydrophilic waterpermeable layer comprising a proteinaceous colloid and a water-dispersible ionogenic polyester-polyurethane wherein isocyanate groups still present in its structure have reacted with an ionogenic compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group. This material is useful for the production of tamper proof laminates for identification purposes.

Abstract: Method for making images by image-wise exposing a silver halide emulsion layer, developing it with an alkaline processing solution in the presence of a silver halide solvent, development nuclei, and a density- and tone-controlling compound, transferring silver complexes from the emulsion layer to a non-light-sensitive image-receiving layer and forming an image therein, said density- and tone-controlling compound being contained in said image-receiving layer and/or in said processing solution and corresponding to the general formula: ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 (same or different) represent hydrogen, C.sub.1 -C.sub.8 alkyl, or Alk.sub.1 --X--Alk.sub.2 --Y--; Alk.sub.1 is (substituted) C.sub.1 -C.sub.8 alkyl; X is --O-- or --S--; Alk.sub.2 is (substituted) C.sub.1 -C.sub.8 alkylene; Y is a single bond, --O--, --S--, --CONH--, --SO.sub.2 NH--, or --NHCONH--; R.sup.3 can alternatively represent (substituted) C.sub.1 -C.sub.8 alkylthio; at least one of R.sup.1, R.sup.2, and R.sup.

Abstract: A lithographic printing plate made by silver complex diffusion transfer process from a lithographic printing plate material which contains a compound represented by the general formula [I] in photographic constituting layer is markedly improved in its printing endurance: ##STR1## wherein M represents hydrogen, an alkali metal or ammonium ion and R.sup.1 -R.sup.4 each represents hydrogen atom, alkyl group, alkenyl group, aralkyl group, aryl group, halogen atom, alkoxy group, hydroxyl group, amino group, carboxyl group, sulfone group, alkoxycarbonyl group, acylamide group or sulfonamide group and two of R.sup.1 -R.sup.4 may jointly form a ring.

Abstract: A method for forming an image with diffusion transfer of silver salts comprising processing a photosensitive element in the presence of a fogging agent.

Abstract: An image-receiving material for a silver salt diffusion transfer process is described, comprising a support having provided thereon an image-receiving layer containing physical development nuclei, wherein the image-receiving layer contains gelatin, a water-soluble fluorescent brightening agent, and a water-soluble vinyl polymer, wherein the weight ratio of the water-soluble fluorescent brightening agent to the gelatin ranges from about 0.02/1 to about 0.5/1 and the weight ratio of the water-soluble vinyl polymer to the water-soluble fluorescent brightening agent ranges from about 0.1/1 to 5/1.

Abstract: A light-sensitive element for the silver salt diffusion transfer method is described, comprising a support bearing thereon at least a light-sensitive silver halide emulsion layer containing silver iodide, wherein at least one layer for trapping on iodide ion is provided between the support and the emulsion layer. This light-sensitive element provides a silver image which is improved in fading and discoloration during storage.

Abstract: Tetra-aza indene compounds of the formula ##STR1## wherein R.sub.1 is alkyl or a ring system and R.sub.2 and R.sub.3 are hydrogen or alkyl.These compounds are of use as image toners in photographic materials.

Abstract: A silver salt diffusion transfer photographic element is disclosed, comprising a support, an image-receiving layer containing at least a silver-precipitating nucleus provided on the support, and a layer containing cellulose acetate having a degree of acetylation of 40 to 49% and a cationic polymer electrolyte sandwiched between the support and the image-receiving layer.

Abstract: A silver salt diffusion transfer photographic element which can provide a positive print having good stability is disclosed, comprising (1) a light-sensitive element including a light-sensitive silver halide emulsion layer containing silver iodide, and (2) an image-receiving element including a support and an image-receiving layer containing silver-depositing nuclei, with said image-receiving element having an iodide ion-capturing layer between said support and said image-receiving layer.

Abstract: A method of forming a silver salt diffusion transfer image comprises developing an imagewise exposed photosensitive silver halide emulsion layer with a developing agent and a silver halide solvent in the presence of an alkali to thereby convert at least a portion of unexpected silver halide in said emulsion layer to a diffusible silver complex salt and transferring at least a portion of said silver complex salt into a silver precipitating agent-containing image receivin- layer to form an image in said image receiving layer.

Abstract: A photographic image receiving element for a silver salt diffusion transfer process which comprises a hydrolyzable first alkali impermeable polymer layer applied on a base and an image receiving layer thereon comprising a hydrolyzable second alkali impermeable polymer layer containing silver precipitation nuclei which is prepared by hydrolyzing at least a part of the hydrolyzable second alkali impermeable polymer layer so as to be alkali permeable, the improvement wherein at least one hydrophilic copolymer layer containing at least one of gum arabic and arabic acid is coated between said first alkali impermeable polymer layer and said image receiving layer, and said first alkali impermeable polymer layer contains at least one compound represented by formula (I) or formula (II) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.

Abstract: A method for image formation by a diffusion transfer process including developing an imagewise light-exposed light-sensitive silver halide emulsion layer in the presence of a developing agent, a silver halide solvent and an alkali, wherein at least two cyclic imide compounds represented by the formula: ##STR1## wherein Z represents an atomic group necessary to form a 5- or 6-membered imido ring containing from 1 to 3 nitrogen atoms, are used as the silver halide solvent is disclosed. Images obtained by the method are stable during storage over a long period of time.

Abstract: An image-receiving element for a silver salt diffusion transfer process is disclosed, wherein the element comprises an image stabilizing agent precursor having an inactive group capable of being removed upon contact with an alkaline processing composition.

Abstract: Disclosed is an image receiving material for silver complex diffusion transfer process which contains gelatin having a calcium content of about 1,000 ppm or less. This image receiving material provides improved silver image density. Further improvement can be attained when said gelatin has a jelly strength of 280 g or above.

Abstract: An image-receiving element for a silver salt diffusion transfer process is described, having an excellent storability before and after development; said element has at least one hydrophilic polymer layer between a layer of a first hydrolyzable alkali-impermeable polymer and an alkali-permeable image-receiving layer which is obtained by hydrolysis at least a part of a layer of the second alkali-impermeable polymer, and which contains silver depositing nuclei, said first layer contains at least one diffusible organic solvent-soluble compound for modifying the photographic properties of a silver transfer image to be formed in the alkali-permeable polymer layer by photographic processing.

Abstract: In a photographic element for a silver salt diffusion transfer process comprising a silver halide light-sensitive element, an image receiving element and a processing element, the improvement wherein the photographic element contains a compound represented by the following general formula (I) or (II) ##STR1## wherein all the symbols are defined in the appended claims. A photographic element for a silver salt diffusion transfer process containing the novel image stabilizing agent has good stability during storage thereof before development processing and provides stable silver images free from discoloration or fading.

Abstract: In a process of forming an image by silver salt diffusion transfer comprising using a processing composition containing an alkali, a hydroxylamine developing agent, and a silver halide solvent, this process of forming an image comprises performing the diffusion transfer in the presence of a compound represented by the general formula: ##STR1## or both this compound and a compound represented by the general formula: ##STR2##