Abstract: In a heat-developable color photosensitive material comprising a photosensitive silver halide, a dye providing compound, and a binder on a support, the content of calcium is controlled to 500 ppm or more based on the total weight of the binder, allowing the use of inexpensive binders. The photosensitive material is cost effective and forms an image with a low fog density (Dmin) and a high image density (Dmax).

Abstract: A process 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 high molecular weight compound containing a repeating unit derived from a vinyl monomer having at least one of a group -COOM and a group -SO.sub.3 M wherein M represents a hydrogen atom or an alkali metal atom, simultaneously with or after imagewise exposure thereof in the presence of water and at least one of a base and a base precursor.

Abstract: A color image is formed by imagewise exposing a photosensitive material comprising at least (a) a photosensitive silver halide, (b) a binder, (c) a dye-providing substance which forms or releases a diffusible dye in response or counter-response to the reduction of the silver halide into silver at elevated temperatures, and (d) a specific-surface-active agent on a support, and heat developing the photosensitive material to form an image.

Abstract: A method for forming an image comprising heating a light-sensitive element in the presence of water and at least one of a base and a base precursor after or simultaneously with imagewise exposure to light thereof, said light-sensitive element comprising a support having provided thereon a light-sensitive layer comprising a light-sensitive silver halide emulsion, a binder, and a dye providing substance which forms or releases a diffusible dye upon heating, and transferring said diffusible dye thus formed or released to a dye fixing layer of a dye fixing element, wherein at least one of said light-sensitive element and said dye fixing element contains an amphoteric surface active agent.

Abstract: A method for forming an image is described, comprising developing a photosensitive element which comprises a support provided thereon a photosensitive layer containing at least a photosensitive silver halide, a binder, and a dye providing substance which forms or releases a diffusible dye by developing after or simultaneously with imagewise exposure thereof, transferring the thus-formed or released diffusible dye to a dye fixing layer of a dye fixing element, and thereafter separating said photosensitive element and said dye fixing element from each other, wherein at least one layer constituting said photosensitive element and said dye fixing element contains an oil component.

Abstract: A photographic paper material comprising:(1) a support comprising a paper substrate with a synthetic resin film provided on both sides thereof;(2) a hydrophilic colloid layer containing a white pigment on one side of the support (1); and(3) a light-sensitive silver halide emulsion layer on the hydrophilic colloid layer (2),wherein the white pigment content of the hydrophilic colloid layer (2) is at least about 68% by weight.

Abstract: A heat developable color light-sensitive material is disclosed, which comprises a support having provided thereon at least a light-sensitive silver halide emulsion, a binder, and a compound having a dye moiety within the molecule and which is capable of releasing, upon reduction of light-sensitive silver halide to silver at elevated temperatures, said dye moiety corresponding to or inversely corresponding to the reduction to form a dye different from said compound in terms of diffusibility, wherein said light-sensitive silver halide emulsion is prepared by forming silver halide grains in the presence of a sensitizing dye.

Abstract: A heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide emulsion, an organic silver salt, and a binder, wherein silver halide grains in the silver halide emulsion are formed in the presence of sensitizing dyes. This light-sensitive material is greatly improved in its storage stability.

Abstract: An image forming method for exposing a light-sensitive material with a semiconductor light source whereby temperature-dependent variations in the radiation intensity and spectral characteristics of the light source are fully compensated for so as to maintain constant exposure conditions. For this purpose, correction coefficients for ambient temperature dependent variations in the radiation intensity and spectral characteristics of the semiconductor light source are stored in a memory as tabulated data. In response to the measured ambient temperature, a correction coefficient is read from the memory and applied to compensate for any variations in the radiation intensity and spectral characteristics of the semiconductor light source. Also, the correction can be effected in accordance with the measured temperature of the light source, that measurement being performed by detecting a change in the forward bias supplied to the semiconductor light source.

Abstract: A photographic paper material comprising (1) a paper support coated on both sides with a synthetic resin film, (2) a hydrophilic colloid layer containing a white pigment provided on one side of the paper support (1), and (3) a light-sensitive silver halide emulsion layer on the hydrophilic colloid layer (2), wherein a dye or pigment which is not decolored during photographic processing is present in the hydrophilic colloid layer (2) and/or the synthetic resin film on the paper support (1).

Abstract: An electrophotographic reversal-developing apparatus according to this invention comprises first means for determining the temperature and humidity of the surroundings in which an electrophotosensitive material is put; and second means responsive to the so determined temperature and humidity of the surroundings for controlling a biase voltage to be applied to a one-component toner, thereby preventing any fog from appearing in a reversal-developed photographic image.

Abstract: An electrophotography developing method according to this invention uses a one-component magnetic toner having an electric resistivity of 10.sup.7 or more ohm.multidot.centimeter, still remaining within the range of inter-particle electric induction, and a coercive force of 150 or more oersteds, thereby preventing appearance of fog in a reversal photographic image, which fog otherwise, would appear in case of reversal, magnetic brush development.

Abstract: A light-sensitive silver halide photographic emulsion characterized by containing a combination of at least one sensitizing dye represented by formula (I) and at least one sensitizing dye represented by formula (II). ##STR1## A silver halide color photographic light-sensitive element comprising a support having thereon at least one light-sensitive emulsion layer comprising a sensitizing dye represented by formula (I) and a sensitizing dye represented by formula (II) is also described.

Abstract: A color photographic light-sensitive material which comprises a support having thereon at least a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a yellow filter layer and a blue-sensitive silver halide emulsion layer, the red-sensitive silver halide emulsion layer being positioned farther from the support than the yellow filter layer.

Abstract: A color photographic light-sensitive material which comprises a support having thereon at least a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a yellow filter layer and a blue-sensitive silver halide layer, in which the green-sensitive layer comprises a first green-sensitive silver halide emulsion layer and a second green sensitive silver halide emulsion layer and the relative positionwise relationship of each layer is in the order of the red-sensitive silver halide emulsion layer, the first green-sensitive silver halide emulsion layer, the yellow filter layer, the blue-sensitive silver halide emulsion layer and the second green-sensitive silver halide emulsion layer from the support.