Abstract: A method for forming an image comprising heating a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide and a binder, simultaneously with or after imagewise exposure thereof in the presence of water, at least one of a base and a base precursor, and an acetylene compound represented by formula (I):R.sub.1 --C.tbd.C--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, a carboxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted carbamoyl group; provided that both R.sub.1 and R.sub.2 do not represent hydrogen atoms at the same time.

Abstract: A metal-containing organic polymer produced by the step of polymerizing a compound represented by formula (I):(R--C.tbd.C).sub.l).sub.k k (L) (S).sub.m (I)whereinS represents a hydrogen atom, a hydroxy group, an amino group, a mercapto group, a polyoxyether group, a polyaminoether group, a polythioether group, a sulfino group or a salt thereof, a sulfo group or a salt thereof, a carboxyl group or a salt thereof or a polymerizable group;R represents a metallic atom, a hydrogen atom, or a group --COOM wherein M represents a hydrogen atom or a metallic atom;provided that when R represents a carboxyl group or a hydrogen atom, said compound represented by formula (I) is polymerized in the presence of a metallic salt;L represents a chemical bond or a group having a valency of (k+m); andl, k and m each represents an integer of 1 or more.

Abstract: A heat-developable color light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder, a dye providing compound capable of releasing or forming a diffusible dye in correspondence or counter-correspondence to a reaction in which silver halide is reduced to silver, a basic metal salt compound which is sparingly soluble in water, and at least one acid precursor compound represented by formula (I) or formula (II): ##STR1## wherein the total number of carbon atoms included in R.sup.1 and R.sup.2 is at least 10, and R.sup.1 and R.sup.2 each represents a group represented by formula (III) or formula (IV): ##STR2## wherein R.sup.11, R.sup.12, R.sup.13, R.sup.14, R.sup.15, R.sup.16, R.sup.17 and R.sup.18 each represents a substituent, provided that R.sup.1 and R.sup.2 are selected such that the sum of the aliphatic Taft's constants (.sigma.* value) of the substituents represented by formula (III), the Taft's constants (.sigma.-value) of R.sup.14 and R.sup.

Abstract: A heat-developable color light sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder, a non-diffusible compound capable of releasing a diffusible dye upon reduction, an electron donor compound and an electron transfer agent, said electron transfer agent being represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents hydrogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; R.sub.5 represents a halogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group; R.sub.6, R.sub.7, R.sub.8 and R.sub.

Abstract: A metal-containing organic polymer produced by the step of polymerizing a compound represented by formula (I):(R--C.tbd.C.sub.lk S).sub.m (I)whereinS represents a hydrogen atom, a hydroxy group, an amino group, a mercapto group, a polyoxyether group, a polyaminoether group, a polythioether group, a sulfino group or a salt thereof, a sulfo group or a salt thereof, a carboxyl group or a salt thereof or a polymerizable group;R represents a metallic atom, a hydrogen atom, or a group --COOM wherein M represents a hydrogen atom or a metallic atom;provided that when R represents a carboxyl group or a hydrogen atom, said compound represented by formula (I) is polymerized in the presence of a metallic salt;L represents a chemical bond or a group having a valency of (k+m); andl, k and m each represents an integer of 1 or more.

Abstract: A light-sensitive material comprising a light-sensitive layer which contains silver halide, a reducing agent, a polymerizable compound and a color image forming substance provided on a support (the silver halide, polymerizable compound and color image forming substance are contained in microcapsules which are dispersed in the light-sensitive layer), characterized in that the microcapsules further contain a dye having a property of being decolorized when it is heated or irradiated with light.

Abstract: A novel heat-developable light-sensitive material is provided comprising at least one light-sensitive silver halide emulsion layer provided on a support, and further containing an acetylene compound represented by the general formula (I):R.sub.1 --L--C.tbd.C--R.sub.2).sub.n (I)wherein L represents a mere bond or a divalent connecting group; n represents an integer of 1 to 4; R.sub.1 represents a hydrogen atom, a carboxyl group, or a substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, alkynyl group, aralkyl group, aryl group, or heterocyclic group when n is 1, and represents a divalent, trivalent or tetravalent residual group when n is 2, 3 or 4; and R.sub.2 represents a hydrogen atom, a carboxyl group, or a substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, alkynyl group, aralkyl group, aryloxycarbonyl group, alkoxycarbonyl group, aryl group, heterocyclic group, or carbamoyl group, with the following two provisos: (1) when n is 2, 3 or 4, the plurality of --L--C.

Abstract: A process for formation of a base, which comprises reacting an acetylide compound with a salt. The acetylide compound has the following formula:(R--C.tbd.C--).sub.n Mwherein R is a monovalent group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group and a heterocyclic group, each of which may have one or more substituent groups; M is an n-valent transition metal atom; and n is 1, 2 or 3. The salt is composed of an anion having an affinity for the transition metal (M) (the affinity of the anion for the transition metal is more than that of the acetylide anion (R--C.tbd.C.crclbar.)), and a cation derived from one selected from the group consisting of an alkali metal, an alkaline earth metal, ammonia and an organic base. A light-sensitive material containing the acetylide compound and the salt is also disclosed.

Abstract: A heat-developable light-sensitive material comprising a support having thereon at least one layer containing a light-sensitive silver halide, a reducing agent, a binder and an acetylene silver compound.The heat-developable light-sensitive material which contains the novel organic silver compound can provide images having high density and low fog when subjected to a short period of developing time even when a small amount of a base processor is used.

Abstract: A heat developable light-sensitive material is disclosed. The material comprises a support having provided thereon at least a light-sensitive silver halide, a reducing agent, a binder and an organic silver salt of the formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, alkynyl, aralkyl, aryl or heterocyclic group; R.sub.2 represents a hydrogen atom or a substituted or unsubstituted alkyl group; R.sub.3 represents a halogen atom, a substituted or unsubstituted alkyl, alkoxy, amino, alkylsulfonyl, arylsulfonyl, carbamoyl, sulfamoyl or alkoxycarbonyl group or a cyano group; X represents ##STR2## wherein R.sub.4 represents a hydrogen atom or a substituted or unsubstituted alkyl group, --SO.sub.2 --, ##STR3## wherein R.sub.5 represents a substituted or unsubstituted alkyl group, and ##STR4## and l represents 0 or an integer of from 1 to 3; and when l is 2 or 3, the groups R.sub.3 may be the same or different.

Abstract: A method for forming an image comprising heating a light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a dye providing substance, a binder, and an acetylene silver compound, simultaneously with or after imagewise exposure thereof in the presence of water and at least one of a base and a base precursor, thereby transferring a diffusible dye thus formed or released to a dye fixing layer.

Abstract: A heat developable light-sensitive material comprising a support having thereon at least one light-sensitive layer wherein at least one layer comprises a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group each of which may be substituted or unsubstituted; a carboxy group or a salt thereof; R.sub.3 and R.sub.

Abstract: A heat developable light-sensitive material containing a novel base precursor (I), which is stable during storage and rapidly decomposes to release a basic component upon heating higher than a certain temperature, has excellent storability and provides an image having a good image quality, i.e., a low fog density and a high image density within a short period of developing time.

Abstract: A heat developable photographic material comprising a support having thereon at least a photosensitive silver halide, a binder, and at least on of base precursors represented by following formula (I) or (II): ##STR1## wherein R represents an alkyl group, an alkylene group, an aryl group, an arylene group, a monovalent or divalent heterocyclic group, each of which may be unsubstituted or substituted; B represents a mono- or di-acidic, nitrogen-containing, sulfur-free base having a pKa of not lower than about 7 and containing 12 carbon atoms or less; x is an integer of 1 when R represents a monovalent group or an integer of 2 when R represents a divalent group, y is the same as x when B represents the mono-acidic base or an integer of 1 when B represents the di-acidic base; and z is an integer of 2 when R represents a monovalent group and B represents the di-acidic base or otherwise an integer of 1; R' represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl g

Abstract: A heat developable light-sensitive material containing a compound represented by the general formula (I):[Ar.sub.n (R).sub.3-n CCO.sub.2 H].sub.l .multidot.B.sub.m (I)wherein ar represents an aryl group or a heterocyclic group; R represents a substituent other than an aryl group and a heterocyclic group; Ar and R may be bonded in a part thereof to form a ring; B represents a mono- or diacidic base which has a pKa of 7 or more and contains 12 or less carbon atoms; n represents an integer from 1 to 3; l and m each represents an integer of 1 or 2 and maintain a relationship in that a number of positive charge and a number of negative charge are equal; when n represents 1 or 2, two R's or Ar's may be the same or different, when n represents 3, three Ar's may be the same or different; and the substituent represented by Ar or R may be further substituted with a substituent.

Abstract: A heat developable light-sensitive material comprising a support having thereon at least a layer containing a novel compound having a group accelerating a reaction of decarboxylation, which releases a base by decarboxylation on heating. The heat developable light-sensitive material provides an image having a high density in a short time and has an improved storage stability.

Abstract: A heat-developable light-sensitive material is described, containing a compound represented by formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkylene group, a substituted or unsubstituted cycloalkylene group, a substituted or unsubstituted alkenylene group, a substituted or unsubstituted alkynylene group, a substituted or unsubstituted aralkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group; R.sub.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group; R.sub.

Abstract: A heat developable light-sensitive material containing a compound represented by formula (I) or (II) ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group, a carboxyl group or a salt thereof, a halogen atom, a cyano group, an alkylsulfonyl or arylsulfonyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl or aryloxycarbonyl group, a di- or mono-alkylphosphoryl or arylphosphoryl group, a di- or mono-alkylphosphinyl or arylphosphinyl group, an alkylsulfinyl or arylsulfinyl group, an acyl group, an amino group, an acylamino group, an acyloxy group or a group represented by X; X represents a decarboxylation accelerating group; or any two of R.sub.1, R.sub.2, and X may combine to form a ring; and the groups represented by R.sub.1, R.sub.

Abstract: A heat-developable light-sensitive material is disclosed, comprising a support and at least one layer containing a novel base precursor releasing a base by thermal decomposition. The heat-developable light-sensitive material of the invention has an improved long-term stability and can provide a high density image in a short time.

Abstract: A heat-developable light-sensitive material is described which is capable of providing images of high density and low fog in a short period of time, and which is excellent in stability. The heat-developable light-sensitive material comprises a support and formed thereon a heat developable light-sensitive layer, wherein said light-sensitive material contains at least one compound selected from the group consisting of compounds represented by formulae (I), (II), (III) and (IV) as a base precursor ##STR1## wherein symbols represent the same groups as defined in claim 1.