Abstract: A noncrystalline silicon powder having excellent photoconductivity is described, comprising silicon and hydrogen, exhibiting an infrared absorption spectrum characterized by absorption peaks centered at about 2000 cm.sup.-1 and 630 cm.sup.-1, wherein the height of the absorbance peak at 2000 cm.sup.-1 is at least one-tenth the height of the peak centered at 630 cm.sup.-1, and exhibiting a spin density of not more than 10.sup.18 cm.sup.-3 determined by electron spin resonance spectroscopy; the noncrystalline silicon powder is used as highly efficient photoconductor in photoconductive compositions utilized for the production of electrophotographic photoreceptors.

Abstract: A function separated type electrophotographic light-sensitive member and a process for production thereof are described, said member comprising an electrically conductive support, a light-sensitive layer made of a hydrogen-doped amorphous silicon semiconductor, and an organic electric charge transport layer containing at least one positive charge transport carrier selected from the group consisting of pyrazolines, aryl-alkanes, arylketones, arylamines and chalcones.

Abstract: A light-sensitive image recording material comprising, as a self-supporting film or in one or more layers on a support, at least(a) a heat sensitive coloring element comprising at least one polyvinyl pyridine and at least one polyvinylidene halide, and(b) a light sensitizing element comprising at least one of(1) a compound which, on exposure to actinic radiation, is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a), or(2) a compound which, on exposure to actinic radiation, is capable of releasing a precursor which is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a) under heating,and a dry process for recording a light image comprising(1) imagewise exposing to actinic radiation the light-sensitive image recording material described above, and(2) uniformly heating the imagewise exposed light-sensitive image recording mate

Abstract: An electric current conductive composition comprising benzotriazole or a derivative thereof and a substantially electrically insulating binder, which is an essential component of an image recording element. The image recording element comprises a support having thereon a layer of the electric current conductive composition further containing a reducible metal compound, preferably an organic silver salt, a reducing agent, and having on different sides thereof an electrically conductive layer, with at least one of the electrically conductive layers being capable of transmitting actinic radiation. Image recording is accomplished by passing in the image recording element an image-wise pattern of an electric current sufficient to produce therein a storable latent image, followed by heating at least the electric current conductive composition layer to produce a visible image at the areas where the electric current passed through the electric current conductive composition.

Abstract: A photosensitive composition containing a .beta.-diketonato-metal chelate compound as an image-forming material with or without a sensitizer, and suitable for use as a direct print-out image recording material, a photochromic material, a heat-developable image recording material or a heat-developable and photo-fixable image recording material.

Abstract: A heat sensitive color forming and heat sensitive electrical conductivity increasing composition comprising a mixture of (A) a basic polymer which reacts with hydrogen halide and is capable of forming a quaternary salt and (B) a halogen-containing polymer capable of forming a conjugated polyene by the elimination of hydrogen halide; and a heat sensitive image recording sheet containing the same.

Abstract: In an image forming process which comprises image-wise exposing to light a laminate composed of a substrate, a photosensitive composition layer and a transparent support, superposed in that order, through the support, removing either the exposed portion or the unexposed portion of the photosensitive composition layer together with the support while adhered thereto, peeling off the support to leave the other of the exposed portion or the unexposed portion of the photosensitive composition layer on the substrate, the improvement where the photosensitive composition comprises:(1) a reaction product prepared by the esterification of: (a) at least one of acrylic acid and methacrylic acid, (b) at least one polybasic acid and (c) at least one polyhydric alcohol;(2) a photo-polymerization initiator; and(3) a binder.

Abstract: A heat developable light-sensitive material comprising at least one layer containing a diazonium salt and a metal-.beta.-diketonate. If desired, these two essential components can be incorporated into different layers of the light-sensitive materials. The heat developable light-sensitive materials forms stable positive images upon exposure and heating.

Abstract: A process for forming metal images of, e.g., copper at high sensitivity by imagewise depositing silver or silver ion on nuclei for physical development distributed on or in a support of an image forming photographic element or in a layer formed on the support of the photographic element to deactivate the physical developing activity of the active nuclei and then bringing the image forming element having the layer of the nuclei for physical developing which were not deactivated into contact with a physical developer containing a reducible heavy metal salt and a reducing agent to imagewise deposit the heavy metal, such as copper, on the remaining nuclei for physical development. A preferred embodiment comprises performing the above image forming process while depositing imagewise the silver or silver ion on the nuclei for physical development from the unexposed portions of an image-exposed silver halide photographic emulsion layer formed on the image forming photographic element by diffusion transfer.

Abstract: A photographic material comprising a support having thereon a light-sensitive layer containing powdered titanium dioxide, a soluble silver salt, a soluble copper (II) salt and a hydrophilic binder and a method of forming a black copper image comprising dipping the imagewise exposed photographic material into an aqueous solution containing a reducing agent.

Abstract: A method for producing an image comprising image-wise exposing a light-sensitive layer containing a sensitizing agent and an image forming compound which can be transferred at non-exposed areas to an image receiving layer upon heating at about 80.degree. to about 200.degree. C, and which can be changed to a non-transferable compound at exposed areas, contacting the light-sensitive layer with the image receiving layer containing a compound which forms a colored image upon reaction with the image forming compound, and heating the light-sensitive layer to transfer the image forming compound to the image receiving layer at non-exposed areas, wherein the image receiving layer comprises an organic tellurium compound and a binder formed on a support.

Abstract: An organo-tellurium light-sensitive material is described which comprises a support having coated thereon at least one layer comprising an organo-tellurium compound, a sensitizer, a binder, and colloidal particles of an element selected from the group consisting of gold, tellurium, germanium, palladium and platinum. The light-sensitive material has improved sensitivity as compared with one not containing the above colloidal particles.

Abstract: A recording material comprising a support having coated thereon a layer of a photopolymerizable composition comprising (a) a chlorinated polyolefin, (b) a monomer having at least one addition-polymerizable unsaturated bond, (c) a photo-polymerization initiator, and (d) a polymeric material having a molecular weight above about 10,000 is described. This recording material is suited for use as a photoresist material, particularly for tenting.

Abstract: An image forming process which comprises image-wise exposing a photosensitive material to light, the photosensitive material comprising a support and a substrate with a photopolymerizable material therebetween, and stripping off the support to leave either exposed areas or non-exposed areas of the photopolymerizable material on the substrate, in which the photopolymerizable material is characterized by comprising at least two different photopolymerizable layers which each comprise one or more addition polymerizable monomers, one or more photopolymerization initiators and one or more binders, which photopolymerizable layers are placed adjacent the support and the substrate, wherein at least one of the ingredients or the ratio of the ingredients of the photopolymerizable layers is different in at least the two different photopolymerizable layers, and the photopolymerizable layers have the relationship of C>A>B and C'>B'>A' or C>B>A and C'>A'>B', wherein:A is the adhesive strength between